Search for the pins on ebay and see what they are selling for. If they aren't very old, they shouldn't be too expensive yet. I think $50-100 is a lot unless this is for all of them (how many?) together.
S-O-UTH F-L-O-R-IDA! South Florida, South Florida, GO BULLS!!!
August 2008: Port Orleans Riverside
July 2007: Polynesian
Feb. 2006: Pop Century
Before that many day trips and too many to list!!! I've been going since I was 3!