This would definitely help clear everything up. Also, we wouldn't have a bunch of people bumping threads since there really isn't THAT many actual sales all the time, but rather lots of ski equipment questions.
Also, is there any chance we could somehow add tags to the side of posts? Like a little image, if we had a sell/buy forum it would really help since people could just have the buy or sell logo next to their post.
If no logos, I think there should be at least some sort of guideline, simple as a capped "BUYING" "SELLING" "TRADING" , and if you want to list what it has to be following the buy/sell/trade :what your selling/brands , in low cap. It would organize everything way better, every thread without the proper format should just be deleted since the idea would be that almost all the recent sales will be right up there in the front page since nothing else is cluttering them.