There's now rumblings that E-bay (UK) are clamping down on advertising markers - see the thread in "announcements".
Not sure if this is true or not, as my bookmark is still displaying paintball gear (including markers advertised as "guns") and the thunderflashes are still up there, but one bidder is getting his ads rejected and the e-mail they are getting sounds like the knee-jerk reaction to paintball we all know and loathe from the mass media. Apparently the listings have to be removed manually, so it may take some time.
Read the thread for possible conjectures as to why this is being done.