Go with CL or local garage sales. At this point your primary objective should be price. If you like beating balls and want to start playing real golf you can worry about quality and fit, until then it's not an issue.
2 things to make sure of:
1) Get a modern set. Or at least a modern half set. You won't need a full 14 club set, a driver, one fairway wood and 4 irons will be plenty for now. Make sure it's oversized titanium driver, metal woods and cavity-back irons. Avoid old stuff with wooden woods and blade irons.
2) Get a set appropriate to your age and size. Don't buy a mens set if you're a woman or a pro level set with extra stiff shafts if you're 5'6" and 120 pounds.