eBay is very good for science-related goods, in my experience. Last week, I bought ~$12K of used gear for a project. All items work, would have cost ~2.5x that from the usual used instrument vendors, about 6x new.

I have ordered items on eBay just for the seller to order it on Amazon and send it to me that way. Just happened to me this week with club bells/Indian clubs.

EBay is the worst website someone can use for shopping…they just got it all wrong. Seems lead by people who don’t use it

Ebay is no less shady. Buy something(from China) that takes a long time to arrive, reviewing is disabled. Ebay is junk.

AliExpress is less shady. If only they had customer service and a decent UI.