DeepDiscountDVD.com is not entirely secure (if you try and buy something you'll see what I mean). They were shit for me (6 weeks plus to fill an order) but I dunno, some people Stateside seem to be ok with them.
I likes DVDSoon or DVDPacific myself
Oh, and to answer the question the last one I bought was Reservoir Dogs SE for like £7 from DVDPacific