With a host of new sophisticated products available today, looking for reasonably priced (under $200) to eventually add into the OBD2 section.
Many are now self contained units that may include separate SD cards for instance. Others may be software related/Bluetooth.
The main goal is to have a comprehensive list of live diagnostics functions that are completely monitored while running or driving, & can help the average owner determine faults.
Please feel free to make any recommendations regarding these OBD2 products.

This is all you will ever need!
Elite AutoScanner Kit - Enhanced OBD I & II Scan Tool | OBD 1300

That does look like a very good product! Pricing is above $200 with a wiring kit from what I can tell though.

Wow looks like a great unit!

Still obtainable even a little over $200.00. I've been looking for years for an OBD1.x unit, but don't want to spend a lot of money for hobbyist service.