question on buying

[wantingamustang]

ok im a just about to turn 17 and looking to buy my frist car. i definetly want a Mustang and I have found a few good deals by me but only bad thing is miles on the cars. One i really like is 94 really good condition new tires, no dents or sctraches, basically mint except miles is 142,000. its about $4,050 for it. Is it worth buying? or second I drive it away you think I am going to have problems? how are these Mustangs known to hold up? there is also another one i am looking at that i like too and only has 101,000 miles but the transmition has been rebuilt and some things to the engine have been done. what you guys think about that one? thanks in advance everyone