I haven't had any trouble using MusicStack http://www.musicstack.com/

or

Gemm http://www8.gemm.com/c/index.cgi?sid...1146&key=58437

I've also used Amazon a lot without much trouble (I did order a record for Spaz once that never turned up but that was from a seller advertising through Amazon and not Amazon themselves.....he has now been removed from their list) so you could try them too.

I have bought stuff through Kinesis as well and have found them to be reliable and helpful.