Ebay is a good source, but use the photos to your advantage. Look them over closely. A listing with out of focus pics indicates to me that the seller doesn't want you to see something. I picked up a 6500 for around $50 in excellent condition. The C3s are the go to reels for a lot of the North Texas big cat guys. The C4s are also good witht he only difference being they have one more bearing. I'm not sure the extra bearing is worth the additional price. FWIW, the new C3s and C4s have been upgraded to have an extra bearing so the new C3 is the same as the old C4. Look for made in Sweden and you won't go wrong.
2015 Seaark 1872 MV CC Etec-90
Helix 12 CHIRP SI, HB 1199, MinnKota Riptide ST80/i-pilot Link, Bob's Hydraulic
Bitter Gun Owner