Re: wtb scan tool
The cheapest and best wau to go is to get Datamaster and put it on a laptop. Works great. Sometimes you can find one of the guys here selling a rig.
Do you have a laptop? datamaster can use several of the ALDL interface cables that the circuit diagrams are posted on the internet. If you do your home work, the whold thing could end up being real cheap.
Hope this helps.