$20.00 each. Painted chromium-molybdenum steel gas tanks (DOT-3AA2250). Labeled: "Compressed Natural Gas CH4". Exterior in very good condition (no rust visible). Valves are currently shut. Tanks haven't been used in a long while and will need to be recertified.
Dimensions: 28" tall (with valve assembly), with a diameter of approx. 6.75"
Weight: 13.7 kg (30.2 lb) for tank #1; 13.4 kg (29.5 lb) for tank #2
Markings for Tank #1: "CL DOT-3AA2250 2-88 * USA" / "720509 Pst GSI"
Markings for Tank #2: "CL DOT-3AA2250 7-86 * MADE IN USA" / (Serial # masked by the safety label)
To the best of my knowledge, the dry weight for this model of tanks is around 22 lb or so; given their current weights, it is likely (but not certain) they are still partially full.