Another vote for Tip Burns as a good guy and great gunsmith. I met him when he and Donna lived down in South Houston and even drove up to Canyon Lake a few times to do business. Last I heard he was working for Blaser. As for the Colt, there are lots of variables. In general, I would say $1,800-$2,800 to an interested buyer. I've got a couple and would suggest you opt for a letter.