TexasCHLforum.com

Never used arms list but I've both bought and sold via local sites including this on and had no issues
Key is to make sure you're both comfortable and get a feel for the person prior to the meet, and choose a nice public place like a busy shopping center parking lot

I've never felt any concern about any purchase or sale made on this site or others and everyone been more than willing to show id to make sure they are a tx resident of age or a chl holder.

If you are really concerned just use an ffl which also opens you up to being able to ship it out of state