Even though its been a few years, I used to visit Atlanta fairly often and there were several local weekend flea markets around the Metro area. You may want to consider selling your items at them. There may also be some smaller "comic collectors" type shows where you can either take items and try to sell them to the sellers or set up and sell them yourself.
if you try taking your items to comic/gaming stores that also sell action figures or TV show and Movie related items. They'll probably offer you between 30 and 50% of their actual value. Before making any decisions about your items divide them into groups MOTU, Transformers... etc. then do an advanced search by using the Advanced button to the right of the main search box at the top of most ebay pages.
Below is a screen shot of a sample Advanced search for Sold items and below that a link to the results page for that search. I chose Toys and Hobbies as the Category, but some may be listed in Collectibles as well. You may find that you have a few desirable items in your collection, but you can get an idea of what your items are worth.
Good Luck
