For multi-platform resellers

Stop guessing.
Start knowing your real profit.

MarketHelper protects your money and saves your time while you sell on Facebook Marketplace, eBay, and beyond.

Get Early Access See how it works
✓ Free to start · Works anywhere you already sell
MarketHelper
Side panel
Buyer · “Would you take $270? Can pick up today.”
“Yes — $270 works for me! When would you like to pick it up?”
Firm Friendly Short Copy ✓
Estimated net profit
$75.93
$35.93 above your $40 walk-away floor
Lifetime$1,240
Defended$385
Sales17
One tool. Every marketplace you sell on.
Facebook Marketplace eBay Poshmark OfferUp Mercari & more
Voice-to-listing

Talk once.
List in seconds.

Speak a rough description of the item. MarketHelper turns it into a clean, professional listing ready to paste into any marketplace.

  • ✓ 3 strong title options
  • ✓ Clear condition & details
  • ✓ One-tap copy
New listing
Voice input
🎙 “Uh, brass table lamp, vintage, works fine, small dent on the base, want like two hundred…”
Title options
Vintage Brass Table Lamp — Working, Minor Base Dent
Mid-Century Brass Lamp | Tested & Working | $200
Solid Brass Vintage Desk Lamp — Great Patina
Condition & details
Used — good condition. Fully tested and working. Small dent on the base, pictured. Solid brass, heavier than it looks. Local pickup preferred.
Copy listing ✓
Traffic light protection

Your financial bodyguard during every offer

See the real net profit after fees and shipping — instantly. Green means accept. Red means walk away.

  • ✓ Set your walk-away number once
  • ✓ Instant green / yellow / red signal
  • ✓ No more emotional decisions at 11pm
ACCEPT
$75.93
Est. net profit · $35.93 above your floor
WALK AWAY $10 net
$270 offer − $36.07 fees − $8 shipping − $150 cost
Patience paid

See exactly how much money you protected

Track every sale and every lowball you rejected. Watch your Lifetime Net Profit grow — and how much you saved by holding the line.

  • ✓ Lifetime profit total
  • ✓ Lowballs defended
  • ✓ Clear history you can trust (and export)
Lifetime net profit
$1,240
After fees, shipping & cost
Lowballs defended
$385
Across 9 offers refused
Decision history
Vintage brass lamp+$90
$180 sale − $90 cost = $90 net
🎯 Held out and got $70 more vs the $110 offer you refused
Vintage brass lamp$15 under
$100 offer · floor $25 · walked away
Mountain bike+$75.93
$270 sale − $36.07 fees − $8 ship − $150 cost

Built for sellers who are done leaving money on the table.

Know your number before you reply. Every time.

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