Sites such as eBay are extremely useful for finding that wonderful collectable, part or a multitude of other things you've been meaning to and wanting to, buy for yourself.
Sadly however, as with many other sites, there are those on these sites, that are doing as much as possible, to part you with your money. There are millions of legit users on there, just like yourself, but don't forget - there's also scammers and other questionable people on there, and unless you read things properly before bidding/buying, you could end up being stung.
For example, you wouldn't be too happy if you bid on what appeared to be a very cheap laptop, only to note when it arrived, that it was actually just a photo of the laptop (the familiar "exactly as pictured" scam).
http://hphosts.blogspot.com/2011/03/eba ... uying.html