I'm selling the ECU from my 2002 Audi A4 1.8T, quattro, manual. The part number is 8E0 909 518 F. This ECU was chipped via APR's DirectPort Programming (DPP). Programs on the ECU include stage 1 (91 octane) and stock programs, for a total of two programs. You can switch between the two programs at will, if for instance you were taking your A4 into the dealer.
This is a great value! You get the actual ECU (about $180) + APR stage 1 ($500) + stock program ($150). These total to over $800! I'm asking $500 + actual shipping costs.
I have a receipt showing that the programming was done. Acutal programming was done in March 2004. This should allow you to receive any future programming upgrades for this vehicle.
The APR website has a guide showing how to swap your stock ECU with the new one.