There are tons of ads for non-Marauder parts for sale in the "Marauder Parts for Sale" forum. Just looking at it now, I have to filter through jackets, car-covers, signs, Aviator engines - none of which are Marauder parts.
A little moderation in this area would be nice. Or, ditch Other Parts for Sale and Misc. for Sale, so that all sellers get a fair chance at grabbing attention.
Frankly, with the ridiculous number of eight dollar complaints, I'm surprised nobody has jumped on this behaviour yet.