Hmm. Minimum post count is not unusual for the FS section. I can think of 2 different forums that I am on that require 50 (and one you need to ask permission). The reason for something like this is to keep people from just jumping on the site to pedal their wares (and possibly ripping people off in the process) and not giving any input to the community.

Don't worry, if you are an interested member of the community the posts will come naturally. BTW, Pit's posts don't count toward your total.

Oh and if you see something you want to buy, you can PM them at any time.