I’ve made my TL866 Programmer Adapter for 27C400/800/160/322 EPROMs available to enthusiasts via eBay, ever since I developed and perfected it a number of years ago (as documented in my earlier posts).
Since then, several hundred have been sold via eBay.
Later, via Tindie, I offered both a Kitset version (for those enthusiasts who preferred to build their own), and also the fully Assembled and Tested version.
Unfortunately, my more recent experience with eBay has been one of frustration.
You can read why in my post here: My eBay seller frustration (Please use Tindie)