You could always message him directly - public negotiations are never really welcomed by sellers in general, and make no sense as you need to PM your personal information if a deal is reached. Free bump for.good stuff.
I have twice. Is why I was like grrr. But I did give him a free bump from it. Don't mind me. I have surgery coming up on Monday. Nerves are kinda shot, so I am a little bitchy. Sorry :-( Best Regards,