I missed an auction on ebay for a Novatouch wich went a hair over a hundred bucks a couple of weeks back.
That sounded like a reasonable price for a board that is kind-of-but-not-really-Topre.
Discontinued electronic products are always available grossly overpriced by some sellers who seem to hope that you need exactly this piece of kit for your special installation and you need it right now, no matter the cost. I am currently hunting for another Logitech G700s mouse because mine is slowly giving in. I'd like a NOS one or one that's as close to new as possible, but all the NOS models I could find were north of 150 bucks, while used, but servicable models go around 35...