I will go ahead and post it here, in case anyone else is interested. It was an easy process actually.
Team has an associated website which is what I used. This is the link.
https://cowboys.strmarketplace.com/default.aspx
There are also 2 other sites. This is one of them, and I don't have the link to the other one.
http://www.pslsource.com/buy_dallas_cowboys_psl/
Basically you list them and your price, and what you owe on them if anything. You get an offer, or make an offer. Then can accept or reject.
In my case we sent messages back and forth for a few days until we agreed on a price and the sale of any of the games.
I really wanted to keep them, but in my circumstances, I also wanted to sell them, as it was a big inconvenience to me for if I was out of town, and trying to get my return on my money. I also had too many people that wanted to go to the games, but didn't ant to offer to pay for a ticket. So I sold them, or tried to. I just didn't want the hassle anymore. But since I am back in town now, but retired, I didn't want the expense anymore either. Figured I would just buy tickets now if I want to go, as I was only getting to one game a year anyway the past 5 years.
As my tickets were $340 per seat, and I had 2 seats. So just don't want the expense, though I could do it, just don't want to. LOL.