You collect these map pieces by playing games in the World Challenge. If you get in the top couple for high scores in that particular challenge, you get a WC piece. Depending on the game you are playing, depends what type of map piece you get. Each world has three different maps, and when you complete a map you get 2000np and a random item. I got a paint brush, but it would have been more profitable to sell my pieces instead of collecting them. Of course, you can buy them.
Depends what you'd pay for the pieces and how you luck is. According to this petpage these are the various chances:
Well if you use an Auction Sniper program (saw one in the downloads section) that should be able to fix the problem of seeing who bids last before the time goes up
Its part of a WC Map. Theyre kinda like treasure maps (or you could say they ARE treasure maps). A full set gives you NP and a random item. It could be junk, or it could be worth millions.
I think all the maps give the same things I converted: Kreludor 1 = i win a invisible pb Kreludor 2 = i win a spotted pb Kreludor 3 = i win a lost desert pb I think this is a waste of money, unless you are very lucky.