These bad experiences emphasise the need for forums like this, made up of a group of people who will look after each other.
I was thinking about the Drop a Card http://cgi.ebay.com.au/ws/eBayISAPI.dll?ViewItem&item=140529879106&ssPageName=STRK:MEWAX:IT on ebay which is being sold by the seller mentioned by CaveofTreasures. Kind of glad I didnt bid because I was relying solely on the description provided.
Definitely all of us need to follow the old rule "Buyer Beware" but this should hopefully only be for dealing with those outside this forum- you would hope that anything sold by our members to other members would be on the level. I have been fortunate - the last pins I either bought or swapped were with  members and both were 100% great.