Welcome Marketplacebazaar and well put, I am investigating UK sites to sell on in addition to eBay.
As part of this activity I have taken a proactive part on thier community boards probing, asking and sounding out their support and experienced sellers for something like a month before even considering writing or adapting a single listing. Very revealing.
I am a minor seller compared with KKB52 'figures', but an experienced seller on eBay and just over a year enjoying the benefits of Auctiva (although very recent to these boards).
So if I can think of doing this why not someone with a big turnover
I meant to say this earlier in this thread