[V8] Best Price for a Reference/Speed Sensor?

[toml99 at todomundo.com]

Hey Bob, my '90 Lago car @ 105K stranded me once, and I had some  
Acetone in the car....soaked some socks in it and peeled back the  
rubber bellows and stuffed them in the filter box.....started right  
up.  Turned out to be the Speed sensor. I'll agree from using the  
ether till I got around to replacing both sensors, that it was enough  
to kick the motor over, then fuel flowed.....Car had been sitting all  
day while I fished so it wasn't a "hot start" issue......Maybe Audi  
built in a glitch to occur @ 105K?.....Tom