TexasCHLforum.com

10ring.com (They used to sell reloading equipment and cleaning equipment mostly, expanded to sell firearms as well. Last time I was in there, they were advertising $20 FFL transfers.)
12779 Jones Road
Houston, TX 77070

Armory Management and Supply Services (Advertised $15 FFL transfers for CHL holders and $20 for non-CHL holders.)
11010 Jones Rd.
Houston, Texas 77070

I haven't dealt with either of them because I haven't had the need for a FFL transfer since I've discovered those two.

I did transfer a Glock through Spectre Firearms @ $35. Really friendly service at Spectre, but they did charge me tax on the $35. Not that an extra 2 dollars rubbed me the wrong way, I just thought it was kind of odd.