Side Hustle MBA
Platform work · starts at $50 – $200

Flipping Books on Amazon

Buy cheap used books from thrift stores, library sales and online arbitrage, then resell them on Amazon for the spread after fees.

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The numbers

Each one links to its source and the day it was checked.

Startup cost
$50 – $200

Source: goaura.com · checked 2026-10-23

Time to first dollar
Days for fast-moving titles; 3–4 months for rare or niche stock

Source: goaura.com · checked 2026-10-23

Earnings
Low
A few hundred dollars a month for a casual seller clearing shelves
Typical
$500–2,000/month part-time
High
$4,000–5,000/month full-time at 30–40 hours a week

Source: goaura.com · checked 2026-10-23
Corroborated by bookscouter.com

What it is

Book flipping is retail arbitrage applied to used books: you scan barcodes in thrift stores, library book sales and estate sales with an app that checks Amazon's current price and sales rank, buy the titles that clear a profit, and list them on Amazon. Textbooks, out-of-print non-fiction, technical manuals and niche hobby books hold resale value far better than mass-market fiction. Most sellers run it as a weekend sourcing routine and ship either themselves (FBM) or through Fulfillment by Amazon.

How it works

  1. Open an Amazon seller account
    Start on the Individual plan at $0.99 per item sold with no monthly fee; switch to Professional at $39.99/month once you are moving roughly 40+ books a month.
  2. Pick a scanning app
    The free Amazon Seller app works for a beginner. Paid scouting apps add offline databases and sales-velocity scores so you can scan a whole shelf without cell signal.
  3. Source cheap inventory
    Thrift stores, library sales, estate sales and Goodwill bins put used books in the $0.50–3 range. Scan ISBNs and buy only what clears your profit floor after fees.
  4. Set a profit floor before you buy
    Experienced sellers aim for roughly $8–12 net per book and ignore anything below it, because the 15% referral fee, the $1.80 media closing fee and shipping eat cheap books alive.
  5. Check sales rank, not just price
    A high price on a book with a weak Best Sellers Rank means it may sit for months. Fast-moving ranks turn over; deep-catalog titles tie up your cash.
  6. List, grade honestly and ship fast
    Condition-grade accurately, ship within one business day, and use USPS Media Mail for books. A single bad review hurts badly when you only have ten ratings.
  7. Reinvest and track per-book margin
    Track what each book actually netted, not gross sales. Scale sourcing hours only once your per-book numbers hold up at volume.

What you need

The gear

Bluetooth laser barcode scanner (e.g. Opticon OPN-2006, Koamtac KDC200)
Pairs with a scouting app and reads ISBNs far faster than a phone camera, which is the difference between scanning a shelf and scanning a store.
Smartphone with a data plan
Runs the scanning app and checks live Amazon prices and sales rank while you are standing in the aisle.
Collapsible crates or a rolling cart
Books are heavy; you need to get a haul from a library sale to the car in one trip.
Digital postal scale
Books ship USPS Media Mail, which is priced by weight, so you need accurate weights to buy postage.
Shipping supplies: padded mailers, poly bags, packing tape
Every FBM sale ships from your house, and packaging cost comes straight out of a thin per-book margin.
Thermal label printer
Prints postage and FBA labels without burning ink cartridges once you are shipping in volume.
Label remover and cleaning kit (Goo Gone, erasers, microfibre cloth)
Lifting price stickers and cleaning covers raises the condition grade you can honestly list, which raises the price.
Portable power bank
Scanning apps and Bluetooth scanners drain a phone fast on a long sourcing day.

The catch

The margin is thin and the labour is physical and unglamorous: you spend hours scanning spines in thrift stores to find the handful of books worth buying, and after Amazon's 15% referral fee, the $1.80 media closing fee and Media Mail postage, a cheap book can net literal pennies — one seller documented $0.07 profit on a real sale. Worse, Amazon gates a large share of used books and textbooks, and sellers report having 60% or even 95% of a haul blocked from listing, which means money already spent on inventory you cannot sell there. Unsold stock is the default outcome, not the exception: one seller said most of a roughly 600-book collection never sold at all, and prices get undercut fast once other sellers list the same ISBN.

Where the work is

Amazon (Seller Central)
ScoutIQ (now inside Threecolts Seller 365)
BookScouter
eBay (second sales channel for gated or slow titles)
Keepa (price history and sales-rank data)
InventoryLab (listing, accounting and the Scoutify 2 scanner app)

Every number on this page

16 facts, each with its source and the day it was checked.

Startup capital needed to begin reselling used books
$50–200
confidence: medium

Source: goaura.com · checked 2026-10-23

Average hold time before a rare or low-volume niche book makes its first sale
3–4 months
confidence: medium

Source: goaura.com · checked 2026-10-23

Typical part-time book reselling income, from selling about 60–250 books a month
$500–2,000/month
confidence: medium

Source: goaura.com · checked 2026-10-23

Amazon selling plan cost: Individual per-item fee vs Professional monthly subscription
$0.99 per item sold, or $39.99/month
confidence: high

Source: sell.amazon.com · checked 2026-10-23

Amazon fees on a book sale: referral fee plus media closing fee
15% referral fee + $1.80 closing fee per media item
confidence: high

Source: sell.amazon.com · checked 2026-10-23

Net profit per used book after all costs
$5–10 typical; $5–15 for experienced resellers
confidence: medium

Source: goaura.com · checked 2026-10-23

Cost of the Seller 365 bundle that now contains ScoutIQ, lowest tier, 1 user
$69/month ($65/month billed annually), 14-day free trial
confidence: high

Source: threecolts.com · checked 2026-10-23

ScoutIQ is no longer sold standalone; it is bundled into every Seller 365 plan
Included in all Seller 365 plans; no standalone price published
confidence: high

Source: threecolts.com · checked 2026-10-23

Keepa Pro subscription price (price-history and sales-rank data)
€29/month or €290/year; free tier exists but excludes Product Finder and data access
confidence: medium

Source: revenuegeeks.com · checked 2026-10-23

Amazon Associates fixed standard commission rate for Physical Books
4.50%
confidence: high

Source: affiliate-program.amazon.com · checked 2026-10-23

Threecolts affiliate program commission on Seller 365 referrals
20% recurring monthly commission for life, no caps
confidence: high

Source: threecolts.com · checked 2026-10-23

BookScouter affiliate program payout per conversion and payment schedule
$1 per conversion, paid on or about the 15th of each month for the prior month, tracked via LinkTrust
confidence: medium

Source: bookscouter.com · checked 2026-10-23

Share of a used-book haul that Amazon blocks from listing (gating), per sellers' reports
60% of one 80-book stack; another seller reported 95% of their used books blocked
confidence: medium

Source: bookscouter.com · checked 2026-10-23

Worst-case per-book economics reported by a seller on a cheap book shipped FBM
$0.07–0.22 net profit after Amazon fees, Media Mail, delivery confirmation and a padded envelope
confidence: medium

Source: bookscouter.com · checked 2026-10-23

InventoryLab subscription (includes the Scoutify 2 scanning app)
$69/month or $690/year
confidence: medium

Source: bookscouter.com · checked 2026-10-23

Free scanning options for a beginner
Amazon Seller app and the BookScouter app are both free; Keepa has a free tier
confidence: high

Source: bookscouter.com · checked 2026-10-23

Researched 2026-10-23. Back to every hustle