I did buy a few Erupters (6-7, can't tell exactly now) years back.
I took one out of the "drawer" weeks ago more for fun than anything else. Assembling the smallest Bitcoin Solo Miner I could.
Onion Omega2+ running BFG miner, a Block Erupter in the USB slot of the board.
It runs smoothly 2 hours every 3 (allowing time to cool off a bit), consumes max 3W when hashing, 1.5W when not.
I know, absolutely useless, total waste of time. Yes, but it's all parts I already had home and keeping it in the living room annoys the wife, mission accomplished
People hear about Bitcoin, cryptos but generally get lost when trying to picture a "computer" mining. This way I can show them "one" without leaving the living room.
Was looking for a Dualminer as I lost mine and wanted to give it a spin on the same board. That's when I looked on Ebay and freaked out.
Can only define them "scammers", you can't possibly sell something like that now, at a higher price than when they came out.
Ka