Here's an overview of what these are selling for on ebay in various condition -
http://www.ebay.co.uk/sch/i.html?_from=R40&_sacat=0&_nkw=tri%20logo%20boba%20fett&LH_Complete=1&LH_Sold=1&rt=nc&_trksid=p2045573.m1684
It looks like the cost of a good conditioned one is a bit higher than the estimate on here although selling on a forum would always be at a more fair price due to no seller fees deducted and just generally dealing with nicer customers (hard to really put a value on that
).
Hope that's of some help and it's always good to do a search on ebay in sold listings to get a basic idea as to value (just always remember those fees you have to pay though).
Ian