The Jewelers Mark conversation has been interesting, and I have a bit of a quandary - I am just starting on getting some of my comics graded/slab. I have a few that I am quite perplexed on how to value, specifically, Marvel Team-up #141 with the jewelers insert (bigger nice dilemma, not sure how I managed to buy two of them at the base book store when it was released, but I have two of these issues). The only price I am seeing for this issue, with the insert, is at mile high comics. I probably have somewhere in the neighborhood of 200 comics with the insert. I am having a hard time figuring out how to determine fair market value for submitting to grading. Any thought would be appreciated. Thanks