Ebay keeps winning?

[Ryum]

I have not really used ebay since component and hdmi cables were selling for 50+ bucks in the stores and only for less than $10 online.
When I started shopping for a smart phone I figured I'd need a SD card and found a 32gig micro SD for $16 (with shipping). Since getting the evo I wanted to get a plastic screen protector, but found the prices to be just really high for almost no difference between products. So I found and ordered 5 screen protectors $1.88 (with free shipping). And now I am looking at cases and I can't help but notice on things like
http://www.amzer.com/Amzer-Silicone-...ack-P87765.htm
just out of this new habit I looked on ebay and
http://cgi.ebay.com/Amzer-Silicone-S...ht_3780wt_1144

Not saying that is the case I am going to get for sure, but it seems that the way to go if you are at all cost conscientious. This is the only place to ask a sizable group of people about accessories for the EVO so I am curious do many people here get their stuff from ebay, or generally from some where else online, or just at a store?