Ebay's selling them for ~$100 per block erupter these days.
That cannot be true, can it? I think I’ve got a couple of these laying around next to my Butterfly Labs FPGA miners somewhere. For $100 each I could probably find the time to locate them. I’m a bit surprised to hear they’re worth anything, but they aren’t a bad collector’s item I guess. OP has them displayed very nicely.
Yeah ~$100 USD is the going rate. I've sold some on ebay for more than that last year. They are probably the most interesting miners available right now. Nice form factor, cool logo, colorful, and practically cheaper than anything else you can find. They won't mine you a single satoshi now days though.
People buy them to learn, to tinker with, and to keep as a soulvenir, or to try and "solo" mine with them... except they are more likely to get struck by lightning 100 times in a row than ever managing to solo mine a block with one of these.