What is the value of a Ithaca M66 Super Single 12 gauge 3 inch chamber shotgun?

Blue Book says:

MODEL 66 -12, 20 ga., or .410 bore single shot lever action, field gun only. Mfg. 1963-78.

100% - $125

98% - $95

95% - $90

90% - $75

80% - $70

70% - $65

~ WILS0N