BTR aren't negative in and of themselves... If you open one up and communication resumes, then you have your desired outcome. A lack of communication, especially after he said he'd send his end, is not something you should have to live with... I'd say open the BTR. Worst case scenario, he gets notified from the Mods and he responds to you... It sounds like he's not the scammer type. Just needs proper motivation to get back in touch with you...
That's just my two cents though.