Many Sellers are insane across the board.
But there are still some gems out there.
In general; I've been buying a new Oscope for myself and needed some probes for it. The new scope is 4channels; so I need for probes. I've been contacting all the "make offer" sellers quoting them a reasonable price for the same items/model number which sold in the last 3mths. About half try to hold firm to their BIN price... Those sellers get a decline and I move on. The others that work with me based upon the sold listing - get my business.
I only bought one Pin on Ebay... back before Pinflation... and I won't do it again. No that the process is bad; it's just that the prices are over-inflated there.