I know nothing about American safes. Some basics, however, are the same the world over!
The basic trouble with safes is that old ones are worth very little. If you were to restore them, even counting your time in at minimum wage, you are unlikely ever to get back what you have put into them. Of course there can be exceptions to that rule, but 99% of the time it holds true.
The first one is either losing the top plate due to deterioration, or even due to an attempted break in, or has probably been compromised and a piece of plate fastened to the top in an attempt to restore integrity. Either way, it has lost whatever security it originally had. The only way, realistically, to restore any level of security, without spending a serious amount on welding, would be to use it in an application which would allow you to cast a concrete monolith around it.
The other 2 seem just to be old and undistinguished safes. There is no shortage of these. I have seen plenty better simply dropped into building groundwork as filler! So unless there is something of which I am unaware, your best policy is to strip off anything of any value and dump them. I realise that this is not what you want to hear, but believe me, it is the truth.
Of course i you work the night shift and have free time, access to a welder paid for by your boss etc., then everything changes.
I play piano and the number of people who have the same idea would surprise you. Old pianos left in houses are almost invariably worthless for exactly the same reasons. They are not economically viable as refurbishment candidates, and would cost a lot of money to get somebody to haul them away to landfill.
