cheap OB2 scanners??

toolmanmike has hit the nail on the head with both of his comments. Listen to him. The MT2500 is obsolete & Snap-On doesn't support it anymore.
I wouldn't recommend investing a lot of money into a "scan tool" if you are only doing DIY repairs. A cheap code reader may be enough, but again, at best you will only get codes & maybe 4 or 5 lines of data from it. Any serious level of diagnosis you would need a better unit.