I've been wanting to get a nice TNG tricorder replica for a long time. But they are so expensive. Roddenberry sells the kits for $250 to $300. And thats without the electronics. Not any people sell electronics for tricorder these days.
I know of a few kits that are up for sale that have electronics. I believe they are cross posted here too. Either way you look at it, it's still cheaper that the real Hero Blinky Trics.