Foxy .. I don't think anyone is having a go at you directly .. but in the past few weeks (since the changes to Road Tax were announced) there seems to have been an influx of folks only joining to try and sell... this is not the ethos of the forum and you may have been tarred with the same brush, by mistake.
Add to that a few problems with buying/selling by shall we say "unscrupulous" persons... and some folks are getting a little twitchy.
You know your intentions ... folks reading your posts don't ... and like everything else on 'tinternet people are prone to jump to wrong conclusions very easily, and you can also "read-in" to any replies things that may well not be meant.
It actually takes very little effort to reach 50 posts .. some folks have done it in a night !!.. you can then advertise your car quite easily