What part of PA?
As for the guns, Both my dad and older brother had model 99s in 300 Sav both bought new in the late 40s at a store on Mill st in Bristol.
I wish i still owned at least one of them. Both had the schnable forend and the brass rotary magazine with the round counter on the receiver.
As for the rim fire, a 22 is always a nice thing to own, especially if you enjoy Squirrel hunting.
But, since your 70 or soon to be, i can assure you you will very soon be 80 and counting.
Will you be still able to walk the woods? Or will you need to be satisfied with slowly driving along the back dirt mountain roads?
A 22 mag would be an excellent choice for the Grouse you will be apt to see on occaission, as well a turkey, although a 223 is better for those. I keep both guns with me, and have little problem with getting a few Grouse and a Turkey pretty regularly. Rainy days are actually good for the Grouse, but you might have more competition from the nay sayers also on those type days.
Go for the body, not the head. Lol