According to the Blue Book of Gun Values (28th Edition) the Beretta A301 is valued at the following, Depending on Which Model You Have:
.................98%......95%......90%.....80%......70%.....
Field.........$360.....$330......$260....$240......$220
Magnum...$385.....$330......$275....$250......$230
Skeet........$360.....$330......$260....$240......$220
Trap..........$350.....$295......$250....$225......$210
98% = may have been used slightly, but shows no wear, perfect condition
95% = may show slight use, no easily apparent marrs or defects, minimal bluing wear, mainly slight at edges and muzzle, little to no scratches. Shiny bore
90% = shows slight wear, only minor defects or dings / scratches. Nice looking bluing but may be worn at edges and muzzle
80% = Everything works, some wear on finish and working surfaces, no corrosion, but maybe some light freckling. Could have very minor dents and scratches. Bore may not be shiny but should not be dark.
70% = Working condition, but finish may be quite worn from sustained use or carry. Wear on working surfaces. Could have some pitting or light corrosion / freckling, and dings or scratches, but they should not interfere with function. Bore should not be dark