Dan and I met back in 2010 or 2011. He was a regular at the record store I had been working in for years. He asked for the Gun Club's Death Party EP and it happened to be the next record in the stack I was pricing. Kind of a magical coincidence when you work around records for a while. We had talked about playing music off and on for a bit, but nothing came of it.
Why we had talked? He is referring to one special event (when he asked for the gun club) and it is obvious that he first talked so past simple could also do it. If it choose past perfect is it to connect both action (the talking and the result nothing came from this discussion.
Maybe he is not referring to that single action (GUN CLUB RECORDS) but every time he came to the shop he had a chat.