Have to agree with Crom00 here.....
Best bet, look for the cheapest SIMMs you can find, and then buy a couple from different sellers... if you want to be safe....
This is a problem on ebay. There this one seller... lol...I guess he found out sony PVM monitors work with Amigas so he has a monitor that routinely sels for $75-$150 listed for $450 or something like that. The aucton text lists it as an "Amiga / Atari monitor" or something like that.. I've seen the same monitor gofor as low as $50 usd.
A couple years back I bought a bunch of 2.5 2 drive ide cables for the A1200. Made the mistake of telling the seller they worked on the Amiga.... Price spikes ($14 from 3.50) and revised Ebay store listings geared towards Amiga users followed soon after..
Oh and video cables... look out!!!! got a quote of $79 the other day.