There is a place on McCart right off I-20 that is beside the McCart Thrift Shop. I believe it is Chip's Furniture. I've seen refrigerators there that aren't too bad. You could check Goodwill or the Salvation Army shop. Look in the phone book under Used Appliances, I bet there will be some shops there.
We bought a frig in Crowley at a used appliance store. I believe we got it for $100 or $150 and it has lasted a long time. I can't remember the name of the shop there. It was a small place off of Crowley Road.
You could also check the newspaper classified ads, Greensheet has used appliances and furniture. These are free small newspapers at Grocery Stores right by the doors when you come in or out of the store. Not all grocery stores have them. I usually see them at the big ones, like Kroger, Tom Thumb, Fiesta. We've put ads in there before. There is also another one called Thrifty Nickel and there may be others. Check those out.