Actually, Harbinger makes a good point. You already own the pistol, so go ahead and shoot it. You might be fortunate and have a reliable PPK/S. It's not as though keeping it unfired will gain you all that much should you decide to sell it.
As for your getting either a Makarov or a PA-63, if you're only going to get one (speaking from personal experience), get the Mak. The 63 is a neat pistol, but its alloy frame lends itself to noticeably increased recoil. And like the Walther, the 63 is known to bite the hand that feeds it. Also, the 63 is not as durable as the Mak and parts are significantly harder to come by.
On the other hand, PA-63s are so inexpensive right now, that it really is feasible for most folks to afford both the 63 and the Makarov. I liked my 63 well enough, but if I could only choose one of the two it would be the Mak, hands down.
Take care. Marko