Clayfish, I don't know where you live but I wish Mausers were 100 around here. The cheapest I saw at our largest gunshow was $250. With Nagants $90-$120.
If you are familiar with handguns, then I would recommend a 9mm. Easy on the wallet and light on recoil. This means some decent time on the range with a fun gun. I own and recommend a Walther P99, but there are some great nines out there. Hi Powers are good, similar to a 1911 but in 9mm. Beretta/Tauras 92 (current military issue), Glocks (not a fan of their trigger, but still a good gun). CZ makes some good pistols too. For some classics there are always Lugers and P38/P01s.
If you're not familiar with handguns, I would recommend a .22 pistol. Very, Very mild recoil and cheap ammo. I would recommend a Ruger Mk II/III or a Browning Buckmark. Both are solid guns with decent triggers.
fanoblack