I am just outside Baltimore, and will attend at least one day. I notice there are dealers here and some will probably attend. Not sure about the rules, but you can PM me with your info, and I do have some coins I would like to submit to a TPG service.
The TPG 's will be set up at the show with show special's. Your best bet is to stop by their booths as for pricing and most will advise if worth grading the specimen .
