try posting in the classified section. I can tell you though, there have been some buyer/seller problems of late, here in this forum. Unless you have been around for awhile, you may find it difficult to find a buyer here. You seem to be on top of your collection and are familiar with the grey sheets , bid/ask prices and the sight unseen blue-sheet . You seem to be well enough armed to haggle well with a local dealer, which I think would be the quickest way for you to disperse some or all of that collection. Good Luck.
Stacks? Good luck. Try Brigandi Coin as well. The big monthly show is in Parsippany, NJ which is about 30 minutes west of the GWB. First Sunday of the month.
With a respected dealer there is no risk at all. You ship the coins Registered Mail and that insures them up to $25,000.00. And the dealer is not a problem because if he was he'd be out of business in a month. Dealers rely on their reputations and integrity to stay in business. And while you may not realize it, on any given day there are literally millions of dollars worth of coins being shipped back and forth between dealers and collectors. I myself have shipped as much as $50,000 worth in a single shipment and never had a problem.
Advice? In the future don't run up your credit cards so you have to sell your coins. I may sound greedy, but sell my cherished coins so I can buy gifts for others that probably won't even be remembered a month from now? I don't think so.