What do you want to do ?
There many opp. , if you want to do much , then you'll spend $500+ , then theres the problum like every other computor , obsilesnce , up dating , service .
I had the 1st scanner that Snap On made , and others .
You may get a lot of doityourselfers , saying to buy a $100 or less , if you want the abilities of a pro scanner than thats what you have to buy , you can find a $2,000 scanner on Ebay , for about $500 , but there are a lot of cartages , accessorys so you should get someone familure with them to make sure you get what you want .
The next thing is service , the people that do it for a living pay a premim , becouse of the service , [ it may be too much , but if you do it for a living you need it ]
The scanner is a MT 2500 , theres up to a dozen or more cartages ,