Am i missing something?

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When I first got started in bitcoin, I probably like many others purchased USB Block Erupters (10) before moving onto bigger setups & renting.

From USB  I probably earned what I paid for.
My mining setup I got my profit from altcoins
But my rental got me 150btc (as proven in other posts on forum).

So today I'm just looking on eBay and I came across multiple listings for USB block erupters - and there going at £30-50 each!!!!

As the title of post says, am I missing something here?
Surely the erupter is useless and provides no return.

Mine are just sitting in my draw of death along with a tamagochi & various other gadgets I've bought over time.

Apart from a bottle opener or a mini heater is there any point in setting them back upto mine something like an altcoin (xmr?) Or better to just sell them

[-ck]

Ebay sellers just hoping to fool some uninformed newbies, and for the most part, it works.