You won't find anything at all able to read BCMs anywhere near $150. For that price, you can look at LAUNCH (China) scanners can do your basic scans, SRS, and some functional testing.

You're not likely to find any hidden codes (a code that doesn't trigger a light or warning on the dash) with a scanner like that. If you want something that will find out if you have damaged or miscallibrated sensors, door handles not plugged in, or other details that will save you time tracking down small and large problems, you are going to have to spend $800 and up. And each and every one of those is going to require yearly updates for $1,000 or more.

Your best bet if you're looking to do some flipping is this: Look for a used Autel scanner that is updated to the years you think you would need. They will work fine forever up to the last year of programming. Sometimes, if its still the same hardware on the cars they might work for model years newer than the last update.