But thats cause we older legacy owers are cheap bastards!!!!

It is $240 WELL SPENT!
I own a 1990 Wagon and Sedan, and a 1992 Wagon. The scanner read all ECUs.
I was able to instantly clear all trouble codes (CELs) and then drive and see what popped back up as the REAL problem! And in the case of my daily driver wagon, I was able to clear a code that I didnt even know was there for ONE FLIPPING YEAR (*a weird idle code) and now I can actually accelerate past 4000 rpm!
It does all this stuff!
It graphically displays all the parameters that my computer-based scan tool can read (plus a little more):




















It reads trouble codes, too:






And lets you clear the memory (resetting codes as well as learned spark/fuel/etc stuff):


Everything he says it can do, it does. Period.
There are a few quirks. Sometimes it doesnt start because it wasnt turned off before the key is turned on. Big deal, turn the car off, the unit off and start over. The 1992 wagon IAC scan tool guage doesnt work, but the numerial read out does. Thats it for problems for me.

Love it! I do wish there was some way to log it, or at least have a "max" record set. But then again, I didnt have squat before.
Money well spent.