it shouldnt affect you much if at all, i work sending car parts internationally at work and when you sell out of the eu (or the uk depending on how this deal is worded) you dont charge VAT, so the prices should be relatively the same once theyre landed to you.
as an example:
if you bought a front bumper at £350 inc vat now, + postage etc to you.
if you bought one internationally, it would now cost £291.67 + postage (then you pay local taxes when it arrives) which is 21% for RoI.