The price sounds good to me. Is it new or used? Have you seen pictures? If you are interested in being screen accurate, there are LOTS of important details that are sometimes left out. There is alot of debate about the color of the flightsuit depending on Boba or Jango and which episode you are going for. If you are going for more of a custom, then you can be less picky.
I would definitely say "buyer beware". Who is it that is going to sell this to you? I would recommend that you do some research and find out if the seller is a reputable person.
Search for "star fortress" on this website FIRST! A lot of people have had bad experiences with them, although those who've had good ones tend to have bought soft parts like you. I haven't bought anything from them but there are plenty of others who have and the results have been inauspicious.
Good luck, for your sake I'm glad you mentioned this.
Just a little note...StarFortress' coveralls, flak vest, gloves, spats, and belt pouches are NOT screen accurate. Not sure about their wookie braids or cape since I've never seen them in person.