MG 34 WWII Germand barrels and bolts and MG42 Slyer 308 barrels.

[samnev]

I have 2 German barrels and 2 German bolts for an MG34 in excellent condition and a Steyr MG 42 308 barrel as new. Since both my MG 34 and MG 42 are gone can tell me what a decent price could I expect to sell them for? Thanks in advance.