(Heavy Sigh)...
Once again, I am going to suggest you purchase a copy of S.J.Fjestad's Blue Book of Gun Values.
Pay particular attention to the PPGS firearm grading section.
It will help you be able to describe,price,and defend your
Pricing and Descriptions.
1. The Colt Mustang .380 is valued at:Exc. Cond: $650.00 USD
V.G. Cond: $475.00 USD
Good Cond: $300.00 USD