It is unbelievable how much these have gone up in price. Not many years ago I paid around $400 each for my Armisport 1842 and 1861! That being said, from what I see now they start in the high $700's up to around $1000. If, and this is a big if, the lock work was done well, they should be worth the $600 each. Lock work done well can make these much more shootable, as they come they have a very heavy trigger pull. Lock work done improperly would leave them unsafe and needing new locks or completely rebuilt locks. Oh, and none should be .62 caliber, three should be .58 rifled and the 1842 should be a .69 smoothbore. If one is indeed a .62 something is very suspect and I would be leery of the deal.