i get tired of looking through the for sale post looking for something useful. I might not be looking for something in particular. I'm an rc car guy, but since im not up and up on all the part numbers and such i have to look at the post to see if it even pertains to cars. How about in the message icon area you add a small plane, boat , and car? That could help.

how are you looking through them and in what forums? there are sale forums just for cars or do you mean specifically radio or engine for cars?

specifically radios but im sure it applies to engines as well if you mentioned it ..... i noticed it when trying to look for radio parts for rc cars ....i had to filter through unknown parts #'s relating to planes and such helcopters to try and find what i need...i think in those forums that simple (simple to me cause i dont know what it takes to get icon up there) little icon would let everyone know what it is for.

Is an icon a better solution or is it better to make a separate radio and engine for sale/wanted forum for cars only?

Lets slow down on the growth of forums unless it gets too big to handle. The Icon may be a better solution. IMHO

hell yeah the seperate forums would be better ....maybe a better set-up would also be to group rc car want ad/sale under the car option (same for planes and such ....our forum jump selection looks small compared to airplanes(25+ to like 6 cars) lol ....thats a male ego thing rofl size does matter
naw the seperate enigine and radio forums would help more than you think