Meteorite Collection for a School

Hi guys! I'm going to be teaching Astronomy at my high school next year and I was thinking about purchasing some meteorites for my class. I would like to have a collection that would represent the major types of meteorites (if there is such a thing) with samples large enough that the kids could see and hold (@#*&!!!??) I don't have a whole lot of money to spend ($200-250) and I don't really want to buy the Meade collection. Any help would be appreciated! Also, I don't know much about meteorites anyway. Thanks. Pete