I can understand were the original poster is coming from, I'm sure people do walk away when they realise they have to sign up for a part which may or may not be the one they want.
I've bought a few car parts online, and I have always phoned up or emailed first and got my reg checked against the part no. to make sure it is the right bit.
I've also clicked away from many sites that require a login to ask a question, and ended up going to a site where either you don't or I am already a member.
This isn't really relevant to me and what I sell, but It is for car parts. I think maybe some catagories should have different rules regarding contact info in listings. For example Tel. No. should be allowed in car parts.
That's my opinion anyway
