Nephew is wanting to sell a very clean 1950s Marlin Model 90 12 gauge. Looked at Gunbroker and based on condition, it would appear that $500 is about a fair price. Would that be consensus or would $400 be more in line? No idea on these older Marlins. From the pic I saw it appears to have no marks on the butt stock and bluing looked strong. If I can get more or better pics will post them.Thank you