A good first stop will be www.cycletrader.com . There are several similar web sites but cycletrader seems to be the most popular and their prices are often what a dealer will quote when talking about a trade value.
Talmadge
My son want to sell his Moto Guzzi V7 Stone 2014.
Where is a good place to find how much the motorcycle is worth and where can it be advertised?
Thanks
Horacio