THe UK cons I've been to that happen to have someone selling figs have a ridiculous mark up. Even if you paid the highest shipping, were caught by customs and dealt with a postal service that wasn't the RM for a higher handling see, the overall cost of the figure would still be less.
That's pretty much the reason after I got my first 3 figures 3 years ago from MCM I've never brought a fig from a con again. Not only that but oftentimes the vendors are selling bootlegs without realising.