Been a while since I've been there but it's typical of small border towns. Not much to offer. If you can get in on a place to hunt, the results are good. Lots of agate and petrified wood, plus flint. I've found points made out of all three plus one out of Jasper. Quite a few bird points but, as typical for So.Tx., the unstemmed blades are the most prominent, Matamoros, Kinney, Catan, Abasolo, Refugio, and ET's.
If you can get in on a place to hunt, the results are good.
So far, I have guaranteed access to a few ranches. I guess it's a good thing that my BIL wears a big, shiny badge, carries a big, shiny gun and has big, shiny lights on his truck. Pretty likable guy, unless you're a poacher or an illegal!