How much would it be to buy one

buy a new starter

you must check wiring cable of left speaker-reconnect antenna cable and check if it is firmly connected and apply contact cleaner over faders.

you wired incorrectly and burnt the amp in the sterio. next time just pay $15 and buy an adapter. plug in and your done.

your probably in a bad place and you wont pick up a signal like if your out of cell phone range, except your probably out of radio range for am stations.

I want to say it sounds like your throw out bearing or pilot bearing when your going down the road when it makes the sound push in the clutch and when it go,s away keep the clutch pushed in and give it some gas and see if it still makes the sound if it dont then it is the throw out bearing or pilot bearing that is all part of a clutch kit sometimes the throw out bearing or pilot bearing gos out befor the clutch doe,s let me know what happens have a good day hope that helps

Best suggestion is to look elsewhere and forget that one unless you can pick it up REALLY cheap and have time and $ to go over everything. Otherwise you are doing diagnostics (free) for the seller that likely he has been trying to repair and can't. There are tons of better vehicles out there if you look. (jeeps). You should be able to find a decent one for anywhere from $1,000 and up, that run pretty well.
No used vehicle is perfect so I suggest that when buying, to set aside about $500 for any repairs and fluid changes necessary to put it on the road.
good luck!!

IMPORTANT NOTE: You must have the security anti-theft code for yours Audi Concert radio from the car manufacturer! For Audi Concert the sequence of programming is:
1. Push simultaneous "SCAN" and "RDS" keys until on the screen will appear "1000" displayed.
2. Release keys. No more push on "SCAN" and "RDS" keys because otherwise number "1000" will be considered as first safe code attempt.
3. By the #1 key you will set up the first safe code digit.
4. By the #2 key you will set up the second safe code digit.
5. By the #3 key you will set up the third safe code digit.
6. By the #4 key you will set up the four-th safe code digit.
7. Then push again simultaneous "SCAN" and "RDS" keys for confirm this safe code. On the screen will be displayed "SAFE" notice. Release keys! For few seconds a radio frequence will be displayed. The radio is now ready for use!

Please rate my response. Thanks!

first check all fuses and relay to fuel pump. have someone turn the key to on, and listen for a humming noise at tank.I do not believe there is a reset for pump. call any auto parts store and they should be able to tell you. or call a dealer and ask to speak to service,

follow intstructions at this link http://www.ibiblio.org/tkan/audi/radios/radios.html
good luck

sounds like the catalytic converter,,,kyle id do some more looking around brfore buying his.you dont know what you might be gettting into