I think the only thing i've bought that didn't come from the UK was my Baofeng and my P30 SERPA as I couldn't find any in the UK. What I like to do is split my purchases up between a few shops so for instance my guns come from Fire Support, Land Warrior and Airsoft Zone.
I'd be pretty dubious about getting a shop in europe, with staff that don't really speak english to honour EU consumer laws to be honest(maybe they would but it's a complication, plus return shipping overseas). There's a couple of big shops over here that try to pull things like making you pay for postage on returns, but at least you could argue the toss without using google translate. It should go without saying it is preference though, for instance I like buying guns face to face wherever possible.