Back-to-school spending in the US tops $80 billion annually, and a growing share of that money flows through the secondhand market. Parents hunting for backpacks, dorm essentials, and brand-name clothing are not just shopping Target — they are scrolling Mercari, Poshmark, and Facebook Marketplace looking for deals.
The resellers who profit from back-to-school season are the ones who source in June and July, list in late July and August, and bank in August and September. If you wait until August to start sourcing, you are already behind.
The Back-to-School Sourcing Calendar
June: Buy the inventory
This is your sourcing window. Garage sales and thrift stores are overflowing with items that families are clearing out as the school year ends. Backpacks, gently used electronics, dorm-compatible home goods, and last year's brand-name clothing are all available at rock-bottom prices because sellers just want them gone before summer.
Target these specific items:
Backpacks: JanSport, The North Face, Fjallraven Kanken, and Herschel are the brands with resale demand. A JanSport Right Pack bought for $5 at a garage sale lists for $25-40. Fjallraven Kankens in good condition: $8-15 sourced, $35-60 listed. Inspect zippers, check for stains (most are washable), and confirm all straps are intact.
Calculators: Texas Instruments TI-84 Plus graphing calculators retail for $100+ and are required by most high school math programs. Used ones in working condition sell for $50-70 on eBay and Mercari. Parents start searching in late July and buy through September. Source them now while nobody else is thinking about math class.
Laptops and tablets: College-bound students need laptops and many families upgrade during summer. Used MacBooks, Chromebooks, and iPads in good condition are strong sellers. A 2020-era MacBook Air sourced for $150-250 at an estate sale can move for $350-500. Wipe the device, verify it is not activation-locked, and include the charger.
Dorm essentials: Desk lamps, small organizers, bedding sets, and compact storage solutions. Graduating seniors dump these items at thrift stores in May and June. College freshmen buy them in August and September. The same items, just a different buyer.
July: Photograph, clean, and prep
Do not wait until August to photograph your back-to-school inventory. Spend July getting every item cleaned, photographed from multiple angles, and prepped with complete descriptions including brand, size, condition notes, and measurements where relevant.
Write descriptions that speak directly to the buyer: "Perfect for back-to-school" and "college-ready" are keywords that parents and students are searching for. Include the specific use case: "Great for AP Calculus and SAT prep" on a TI-84 listing immediately tells the buyer this is what they need.
Late July through August: List and promote
Start listing the last week of July. Back-to-school shopping begins in early August for most families and peaks in the last two weeks before school starts. Price competitively against new retail — your edge is offering 30-50% savings on name-brand items in good condition.
The Numbers: What to Source and What to Expect
| Item | Source For | List For | Peak Demand |
|---|---|---|---|
| JanSport backpack | $3-8 | $25-40 | Aug 1-25 |
| Fjallraven Kanken | $8-15 | $35-60 | Aug 1-25 |
| TI-84 calculator | $10-25 | $50-70 | Jul 20 - Sep 10 |
| MacBook Air (2020+) | $150-250 | $350-500 | Aug 1 - Sep 15 |
| Dorm desk lamp | $2-5 | $12-20 | Aug 5-30 |
| Nike/Adidas sneakers (kids) | $5-12 | $25-45 | Aug 1-25 |
| Bedding set (twin XL) | $5-10 | $20-35 | Aug 1-25 |
🔧 Rollo USB Shipping Label Printer
If you are shipping 5+ packages a week for back-to-school season, handwriting labels is costing you time and looking unprofessional. The Rollo prints one 4x6 label per second and works with every major shipping platform.
Check Price on AmazonAs an Amazon Associate we earn from qualifying purchases.
Platform Strategy for Back-to-School
Mercari: Best for general back-to-school items — backpacks, school supplies, electronics. Broad audience of practical buyers. The 10% fee is competitive.
Facebook Marketplace: Best for electronics and bulky dorm items where local pickup avoids shipping hassles. Price slightly higher than online-only platforms because buyers save on shipping.
Poshmark: Best for brand-name clothing and shoes. Back-to-school fashion shoppers browse Poshmark for Nike, Lululemon, and designer brands at a discount.
eBay: Best for calculators, electronics, and niche school supplies. Largest search-driven audience for specific items.
Ideally, cross-list everything so you catch buyers on every platform simultaneously. Speed matters — the back-to-school window is short and competitive.
For a broader view of summer sourcing strategy, read the Summer Slowdown Survival Guide and the 2026 Summer BOLO List.
Want Our Free BOLO List?
The brands, items, and categories resellers are flipping for serious profit right now.
Get the List →