I can't quite understand you classicgaming collectors.
I guess that like all collectors, you are a bit crazy, willing to pay a lot for a certain rare item I would never even bother to give attention to.
Well, e-bay salespeople are not stupid. They realize that if their merchandise becomes a "collector's item" its value goes skyrockets. So they overprice it, 'cus obviously collectors would pay the price.
So... Let's make a list. Clothing on e-bay is expensive. Really. 15-20$ for a shirt is like, twice than I'd pay for it in my country. According to what I heard here, video games are expensive too.
Electronics, on the other hand, is quite cheaper than in the markets, but not always safe to buy.
And you know what else is cheap? Books!!
That's right. Look what I just got:
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2208637122957 Asimov books, Foundation Trilogy included, plus a "District 9" DVD for only 43$, shipment included.
The books themselves cost only 10.25$.
The shipment is expensive, but still it's like 10 times cheaper than buying from a book store, and the guy was generous enough to include a DVD with it! How awesome is that?