I'd watch out for the plans sellers on eBay. Some are good and sell original plans from their personal stashes; others flog copies without regard for copyright or ensuring that the copies are correct. Then there are the ones who sell the "thousands of plans on CD-ROM"

eBay runs with the auction premise: buyer beware!

If you're looking around for plans, I'd recommend trying the magazine publishers first. They are the holders of the LEGAL copyright for the plans they are selling and you can be guaranteed that the plans you will recieve are 100% correct and do not have errors introduced by being cheaply photocopied.

Oh well, enough of my sounding off on this soapbox for now....