The plain-English system for buying secondhand for less, selling it on the right app, and letting AI tools handle the busywork. About 5 hours a week once your tools are set up.
Get the Flip Playbook for $27Instant download. Comes with the Flip Tracker, free.
Not sure where to sell it? Try the calculatorNone of that is a hustle problem. It’s a system problem, and this book gives you a rule for every one.
Same item, six different paychecks. Type what it’ll sell for and what you paid to see what you’d keep on each app.
Tools pay when volume pays: $70 a month is $7 a sale at 10 sales, but $1 at 70.
Your profit after app fees, what you paid, and any shipping you cover. Before taxes.
The lowest fee isn’t always the best app.
The right buyer often pays more. Vintage and streetwear move on Depop and Whatnot, rare finds on eBay, and everyday brands on Poshmark and Mercari. The book shows you how to pick.
Fees as checked in October 2026 from published fee schedules, and apps change them often. TikTok Shop is shown at 8% to be safe; its public table lists 6% (5% for pre-owned). Fees here are figured on the sale price; eBay, Depop, and Whatnot also charge on shipping.
I built Very Wavy into a Poshmark closet with about 300,000 followers. This book is the system behind it, rebuilt for today: more apps than Poshmark, AI tools that write and share for you, and math that shows what you really keep.
You don’t need to quit your job to build a reselling business. You need a system that fits in the hours you already have, and tools that do the busywork while you’re at work.
Ride the W.A.V.E.
The book’s flip week, once your tools are set up.
Your week will look different. Level 9 shows you how to build yours around your job.
“I already sell, but sales slowed and I’m doing too much by hand.”
“I want extra money, but I work all day and don’t know where to start.”
Short chapters, real fee math, and a sticky rule in every level.
Start with 10 things you haven’t worn in a year, book your selling hours, and set up a simple starter kit.
Every item gets a number.
Where to hunt, how to scan a rack fast, and how to spot fakes.
The B.U.Y. check: Brand people search for. Undamaged. Yield of 3x or more.
Count what you really keep: fees, supplies, shipping you cover, and tools.
Price to the sold, not the dream.
Phone photos that sell, titles buyers search for, and AI drafts you check.
Show the flaw, keep the sale.
What sells where on Poshmark, eBay, Mercari, Depop, Whatnot, and TikTok Shop, and how to crosslist without selling one item twice.
Start with two. Sold on one, gone from all.
The tools that write, share, and crosslist for you, and the test for which ones to pay for.
Hire tools like employees.
Get seen, handle offers and bundles, and ship around your workday.
Sold today, shipped tomorrow.
When a live show is worth it, how to run one, and the per-order fees that eat cheap sales.
Live is for hype, not for cheap.
Your 5-hour week, your hourly, the listing clock, and where the money goes.
30 refresh, 60 drop, 90 go.
Then finish with the 30-day plan or the 14-day reset, plus a one-page cheat sheet and a plain-English glossary.
It’s a spreadsheet that works in Excel or Google Sheets. It sells for $17 on its own. With the book, it’s yours free.
Every sale moves you toward the next one. Hit 10 sales with no pile and known numbers, and the level-up test says raise your budget, using profit only.
9 levels, the 30-day plan, the 14-day reset, a cheat sheet, and a glossary.
True profit on six apps, your listing clock, and your weekly hourly.
Education only. Your results depend on what you buy, list, and sell.
Yes. You start with 10 things you haven’t worn in a year. They’re your practice laps, so you learn photos, titles, and shipping on stuff that already paid for itself. Then follow Levels 1 to 9 and the 30-day plan.
That’s who it’s built for first. Read Levels 3, 5, 6, and 9, then run the 14-day reset. You’ll find your real profit per sale, the apps that pay you best, and the tools that earn their keep.
Poshmark, eBay, Mercari, Depop, Whatnot, and TikTok Shop, with fees as checked in October 2026. Fees change, so the book shows where to check them, and you can update them in the tracker.
None. Your first 10 items come from your own closet, and those sales pay for your first sourcing run.
No. You can start free. The hire test shows you when a tool saves enough of your time to pay for itself.
The book’s flip week takes about 5 hours once your tools are set up. Yours may look different, and Level 9 shows you how to build it around your job.
The book covers the 1099-K basics, and the tracker sets aside a slice of your weekly profit for taxes. It’s not tax advice, so ask a tax pro about yours.
Right after checkout you get one download with the book (a PDF) and the Flip Tracker spreadsheet. The tracker opens in Excel, or upload it to Google Drive and open it with Google Sheets.
Because it’s an instant digital download, all sales are final.
Worth it after everything. All flaws shown. Volume beats perfect. Exit the dead stock. Your first flip starts the minute you download.
Get the Flip Playbook for $27The Very Wavy Flip Playbook and Flip Tracker are for education only. They are not tax, legal, or financial advice, and nothing here promises income. Your results depend on what you buy, how you list, and your market. Fees and rules change, so check each app before you sell. All examples are made up. Poshmark, eBay, Mercari, Depop, Whatnot, and TikTok Shop are trademarks of their owners, who don’t sponsor or endorse this book. © 2026 Angel Folgar