Hey FumDuk, the 1999 and 2000 models had the 'smaller' Cougar cat logo on the steering wheel. Only the 01 models had the larger cat, different steering wheel and interior trim altogether.
There were also the exterior differences.
Basically, the 99-00 models were the SW series, while the 01's were SX's (where the model was upgraded and facelifted).
Good luck with your bidding, have you seen the car for real though? I couldn't imagine buying a car sight unseen myself
Dan