The easy way would be to pull out the latest edition, Blue Book of Gun Values and look the gun in question up in it. Even then I like to back that information up with whats selling and what has actually sold on Gunbroker
First off you can't just say Marlin 30-30 Lever Action. you need to ask the following questions.
- What Model?
- What Condition?
- Year of manufacture?
- Special Edition?
- Stock material/style: (for the 30-30) Walnut being the most valuable in my opinion, birch being the lowest quality. A laminated stock can never be restored, and has pretty crappy wood underneath the laminate, they call "assorted hardwood".
- Barrel Style: (for the 30-30) Octagon barrels add about $300 automatically!
- Stainless or blued: Stainless has the best re-sale value, but blued looks better in my opinion, but you need to be more careful not to let it rust and keep it oiled.
you can pick up a low end used Marlin 30-30 in good condition for as low as $200 on www.gunbroker.com sometimes a little less, I would consider $180 a pretty darn good deal on your basic blued Marlin 30-30 with a birch stock. If it comes with a scope that counts almost for nothing value wise, most people put on their own scopes that they are partial too anyway. I personally like open sights for lever actions anyway.