Sell FreeStyle Libre Sensors for Cash
Yes. Sealed FreeStyle Libre 2 and Libre 3 sensors in their original boxes can be sold for cash, by mail from any US state or through an in-person buyer near you. If your insurance switched you to a newer Libre model, your doctor changed your CGM, or you have leftover boxes from a prescription that ran ahead of your actual use, those sealed sensors have real value and a direct buyer is available.
Cash For Test Strips USA is an independent buyer. This site is not affiliated with, endorsed by, or connected to Abbott Laboratories or its FreeStyle Libre product line in any way. FreeStyle, FreeStyle Libre, Libre 2, and Libre 3 are trademarks of Abbott Laboratories, used here only to identify the products being bought and sold.
Which FreeStyle Libre products are accepted
All items below must be sealed in their original, unopened retail packaging. Opened boxes cannot be accepted regardless of how recently the seal was broken.
FreeStyle Libre 3
- Libre 3 Sensor
- Libre 3 Plus Sensor
- Libre 3 Reader
FreeStyle Libre 2
- Libre 2 Sensor
- Libre 2 Plus Sensor
- Libre 2 Reader
FreeStyle Libre 14 Day
- Libre 14 Day Sensor
If you are not sure whether a specific variant is currently on the list, the fastest way to check is to photograph the front of the box and send it with your quote request. A clear photo takes seconds and gives a buyer everything they need to confirm the model. What to photograph and how to send it.
Two ways to sell: mail-in or local
The mail-in route works from all 50 states. You receive a prepaid USPS shipping label, pack your sealed sensor boxes, and drop the parcel at any post office. Payment is sent after the boxes arrive and are confirmed sealed. Start a mail-in kit here.
If you prefer to be paid on the same day without shipping anything, the buyer directory lists in-person buyers sorted by distance from your ZIP code. Each listing shows what brands the buyer accepts so you can confirm FreeStyle Libre is on their list before meeting.
Why sellers end up with sealed Libre boxes
CGM prescriptions change more often than most people expect. Insurance formularies shift between Libre 2 and Libre 3, sometimes mid-refill cycle. Doctors switch patients from one system to another. Some people get a three-month supply at a time and switch systems before finishing it. In each case, the leftover boxes are sealed and the sensors inside are new — they simply no longer match the system the person is using.
That mismatch is the whole reason a buyer market exists. The boxes have value to someone whose insurance covers a different sensor, and selling them is the straightforward alternative to leaving them unused in a drawer.
What is not accepted
Opened boxes are not bought under any circumstances. Supplies paid for through a government-covered program cannot be resold. Test strips, lancets, and insulin are not bought in this category — the accepted list is CGM sensors and readers. Full list of what is not accepted and why.
Frequently Asked Questions
Can I sell sealed FreeStyle Libre 3 sensors for cash?
Yes. Sealed FreeStyle Libre 3 and Libre 3 Plus sensors in their original, unopened boxes are accepted for cash. You can sell by mail from anywhere in the US or find an in-person buyer near you. There is no auction, no public listing, and no platform fee.
Do you buy FreeStyle Libre 2 and Libre 2 Plus sensors?
Yes. Libre 2 and Libre 2 Plus sensors in sealed original packaging are on the accepted list alongside the newer Libre 3 lines. If you still have Libre 2 stock after switching to Libre 3, both can be quoted together in one transaction.
Are FreeStyle Libre readers also bought, or just the sensors?
Libre readers are also accepted — Libre 2 readers and Libre 3 readers both qualify when sealed and in original packaging. If you have a reader you no longer use alongside leftover sensors, include it in the same quote.
I switched from FreeStyle Libre to a Dexcom CGM. Can I still sell my leftover Libre boxes?
Yes. A CGM system switch is the most common reason people end up with sealed supplies they cannot use — the two systems are not compatible, so leftover Libre boxes have no use once you have moved to a different sensor. Those sealed boxes can be sold by mail from any US state.
How do I start a mail-in sale for FreeStyle Libre sensors?
Go to cash4teststripsusa.com/mail-in-kit to start a kit. You will get a prepaid USPS shipping label, pack your sealed boxes, and drop the parcel at any post office. Payment follows after the boxes arrive. The mail-in route is open to all 50 states — no local buyer needed.
What if I am not sure which Libre generation I have?
The generation is printed on the box. Libre 2, Libre 2 Plus, Libre 3, and Libre 3 Plus each say so on the front panel. A photograph of the front of the box gives a buyer everything needed to confirm the line and whether it is on the current accepted list.
Related reading: What buyers do not accept · FreeStyle test strips · How the mail-in process works · Is it legal to sell?
Ready to sell your sealed FreeStyle Libre sensors?