Paul, you may have left out these.....
Always compare the price (not incl p&p) with the most mudane thing you've bought in the last week...crisps, bacon sarnie, newspaper,bog roll ...you get the gist!
When selling a "set" of anything you must tell 'em that you paid that price last week for just one! (and the quality wasn't so good)
Shout straight down the camera to your imaginary aunt Fanny (who always watches your shows)" buy me one,"nod your head about and make "telephone" signs with your fingers.
Advise viewers to buy up in bulk and sell 'em on, and ffs don't let slip that it's gonna cost a fortune.
Say you wouldn't be surprised if these (jewellery items) weren't being bought up by the trade (only however, if you can keep a straight face!)
Make sure you say that at least one in three items is making us a loss...more, if you think you can get away with it, no b*gger it...EVERYTHING!