Yeah... I've got most of the mainstream stuff that I want (barring new releases) so most, if not all my internet ordering is for more obscure titles. Due to the shitty pound vs. USD and Euro it is getting much harder and much more expensive to fill obscure gaps in my collection though...
Most of sites I used to use have also upped shipping costs to the UK, meaning that sometimes the postage is more than the DVD!
I'm finding that I am using eBay a hell of a lot more than I used to, as most seller's buy in bulk so are able to source import DVD's a lot cheaper. A few years ago eBay prices were laughable compared to the likes of Xploited, Bloodbuster, Chainsaw, Diabolik, DTM etc. - now they don't see so bad... (esp. as most shops now offer free UK shipping) - even Amazon.com and .de can be pricey (mainly due to the shipping).