https://abecorn.com/#!/trade/5704173ce4b017e3d185db25?localhub=610f5c677facfb003d3cc575
The Gen Con Math Trade is now populating at the above webpage.
If you've never done a Math Trade it's an item swap where a program called Abecorn figures out the way to have the most trades possible. You will probably not trade your item directly for what you want but when you figure in dozens of other traders, you can get what you want for what you have (within reason). I type "item swap" because some of us renaissance gamers will trade nearly anything geek for nearly anything else geek. The majority of the trades will be board games for board games.
You don't NEED a ticket to participate but it's encouraged (Gen Con's bean counters give us space depending on the number of people in the event). If you can't make Sunday morning, you will have to directly contact the other traders.
There is a tutorial on the abecorn.com website but we'll gladly answer any question you may have.