Sounds to me like he is looking for someone in particular who was at Nearfest and advertised that they bought tubes, which means it's not that he's looking to sell to everyone here, he's looking for a specific person and asked if anyone knew who that was.
Yes, I get that idea but it can't hurt to ask? It is his first post. sometimes people join a board just for a certain reason and then go away, never to be heard from again?