Hi
Below are some links. I suggest visit some of them.
Thinks to watch for are
1) body repairs. A big or small dent it costs about the same te get fixed. Here it's about $600 a body panel repair. a good paint job costs more a good 944 will cost.
2) Mechanical repairs clutch gone about $1,000 Timing belt replacement about $1,000 new shocks about $700 all 4 together Tires about $400-$700 depending on size, type and brand Brakes dishes about $100-$200 a piece depending on type
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Good luck in finding a nice one.
Paul