Most common issue is 3rd gear synchro on SRT-4's. Depending on how the car is driven by an owner this issue will become vary apparent quickly. My car has almost 65k miles and I've yet to have any tranny problems. My wife's SRT-4 has 90k+ miles and no tranny problems.

I find the 05 transmissions to be a bit more notchy then 04's. 03 trannies don't come with LSD unless a previous owner swapped trans with an 04-05 or they put an lsd in their 03.

Typically at this moment you can get SRT-4's from 8-10k with around the mileage you mentioned and some less. Some are stock, some modded, some were modded and brought back to stock. You still have some trying to sell their's in the 11k-15k range and some even more.

Other then that they aren't bad cars at all. IMO they are very reliable if you keep up with maintenance and if you don't rag on them 24/7 or better yet slap a bunch of parts on them at once and not be able to tell which of the parts is giving you problems/headaches.

I recommend you having someone who knows these cars go with you when looking at them to make sure they are mechanically sound.