The price difference will be down to the change in wire and socket configuration. CE have recently swopped from the standard westone 2 pin socket/cable that we all know and love to the newer t2 (like mmx ala shure but better apparantly) and linum (thinner with no memory wire, thank god) cable. Have you made an account with CE yet and requested the shop to be opened? If not that's the next step that you'll have to take before ordering. I still see BA2 on my order page and goes through fine.