Published November 8, 2026

How to Sell Leftover Dexcom G7 Sensors by Mail

Switched plans or sensors and still have sealed Dexcom G7 boxes? Here is how selling them by mail works, from the free label to getting paid.

Have supplies to sell?

Call or text — we respond within hours.

Call 518-278-6008

If your plan moved you to a different sensor, or you went from the G7 10 Day to the 15 Day, the sealed Dexcom G7 boxes left in your closet can still be sold, and the only trip it takes is one to the Post Office. You list the boxes on our mail-in kit form, ship them with a free prepaid USPS label, and get paid the day after the box arrives.

Leftovers like these are almost never planned. A new plan year starts, the new sensor shows up, and the last order of the old one is still sitting there, sealed and paid for. Most people put the boxes on a shelf and mean to deal with them later. This is the "later."

Which G7 boxes we can buy

We buy sealed Dexcom G7 sensors in both lengths, plus sealed G7 receivers. The box code printed on the box is the quickest way to tell which version you have:

  • Dexcom G7 10 Day sensors: STP-AT-011, STP-AT-012 or STP-AT-018
  • Dexcom G7 15 Day sensors: STP-FT-010 or STP-FT-012
  • Dexcom G7 receivers, sealed

The receiver is the one people forget. Plenty of people read their numbers on a phone and never open the receiver at all, so check the bottom of the bag before you count.

Every box needs to be sealed and in its original packaging. We cannot buy opened boxes or loose sensors, and we do not buy Dexcom G6. The Dexcom G7 sensors page has more on each version, and if a code is hard to read, text a photo of the box front to 518-278-6008.

Look at the date on the box first

Before you fill anything in, find the date printed on each box. With 7 or more months left, the kit form gives you an instant quote. With fewer than 7 months left, you use Submit for a quote instead, and a person at our office prices those boxes. Either way, you see the number before anything is shipped.

What selling by mail actually looks like

The kit form asks which sensors you have, how many boxes, the date on each, the box condition, and how you want to be paid. Then you get a free prepaid USPS label and a QR code. No printer at home is fine: show the QR code at the Post Office and they print the label for you.

Pack the sealed boxes snugly in a sturdy outer box so they cannot slide around, tape the label on, and drop it off. Our guide to packing diabetic supplies for shipping walks through it.

While the box travels, you can follow it on the track my kit page with your kit number and the last four digits of your phone. The day after it arrives, you are paid by the method you picked: Zelle, Venmo, Cash App, ACH or check.

How box condition fits in

Each box gets one of three grades, Mint, Dinged or Damaged, and the grade affects the price. The box conditions page shows photos of each, so you can pick the closest match on the form instead of guessing.

If you would rather not mail anything

Mail-in works from any state, but it is not the only way. Our local buyer directory lists buyers by ZIP code if you would rather hand boxes over in person. If you are sitting on a large number of boxes, the bulk selling page explains how bigger lots are quoted.

And if you are still deciding who to trust with your boxes, that is a fair question to ask of any buyer, us included. We wrote up what to look for in are test strip buyers legit? and answered it about ourselves in is Cash For Test Strips USA legit?

When you are ready, start your mail-in kit with the boxes in front of you. Questions first? Call or text 518-278-6008.

Frequently Asked Questions

Can I sell Dexcom G7 sensors I have left over after switching plans?

Yes, as long as the boxes are sealed and in their original packaging. Cash For Test Strips USA buys sealed G7 10 Day and 15 Day sensors and sealed G7 receivers by mail from all 50 states.

Do you buy the 15 Day G7 as well as the 10 Day?

Yes. We buy 10 Day sensors (box codes STP-AT-011, STP-AT-012, STP-AT-018) and 15 Day sensors (STP-FT-010, STP-FT-012).

What if my G7 boxes have fewer than 7 months left on the date printed on the box?

Use Submit for a quote on the kit form and a person at our office prices them. With 7 or more months left, you get an instant quote on the form.

Do you buy Dexcom G6 sensors?

No. For Dexcom, we buy sealed G7 sensors and sealed G7 receivers only.

When do I get paid for G7 sensors I mail in?

The day after your box arrives, by Zelle, Venmo, Cash App, ACH or check, whichever you chose on the kit form.

Ready to Sell Your Supplies?

Sealed test strips, CGM sensors and insulin pods — we buy them all.