Yes most Costco hearing aids are programmable elsewhere. Only KS5 and KS6 (that we know for sure) are Aventa software locked. We are suspicious about ReSound Cala being Aventa software locked, and we are suspicious about ReSound Forte being SmartFit software locked.
Costco used hearing aids are the same as any other used hearing aids (with the exception of the above mentioned models). Actually you may even get a better bargain because of all the locked rumors.
It doesn’t matter whether or not an EBay seller accepts returns. If the seller is listing unusable/locked/junk then you get your money back, period. Don’t forget to demand that the seller pays for return shipping. If the EBay Buyer’s guarantee doesn’t go well use your credit card chargeback rights (requires that the transaction was funded 100% via credit card, and not from your online balance, and not from your bank account).
A couple of EBay tricks;
- Click “See other items” to try to determine if the seller is a dealer who regularly sells hearing aids. A dealer will hold out for higher prices as opposed to an estate sale price.
- Click the  Sold listings box in the left pane to filter your search to only items that have already been sold. This might give you some recent sell price history.
And for newbies;
Don’t expect factory support for repair when you buy used HAs. You likely will have no warranty unless there is remaining warranty and you are able to get it transferred into your name. Don’t try to use factory repair for HAs bought on EBay, as HAs that were reported lost may get confiscated. Factory repair is way too expensive anyway. You will likely need to use an online Hearing Aid Repair Lab for minor repairs or even buy a replacement HA for major problems. Both are relatively cheap.