M9 Bayonet Lore Factory New is a knife skin of Covert quality for the M9 Bayonet knife that was introduced to the game back in June 2016 as a part of the Gamma Exposure Update. The M9 Bayonet can be received as a random reward from within two CS:GO weapon cases, them being Gamma Case and Gamma 2 Case.
When it comes to the design, the knife features a thick golden blade with decorative inlays, a sharp cutting edge on one side, and serrations on the other. The M9 Bayonet Lore skin comes in all five different exterior qualities and can also have StatTrak technology attached to it.
In terms of value, the M9 Bayonet Lore skin is considered to be among the more expensive skins, but it highly depends on whether it has StatTrak as well as the skin exterior. While the lower tier versions can be obtained for a few hundred dollars, those with StatTrak in good condition can cost up to $2000.
If you don't want to sell skins but want to have some more expensive ones, you can trade CSGO skins for other ones.