Avoid any F150 2018 or newer. They have tons of issues.

Take a look at the Autel scan tools. They have a lot of options to fit whatever you want to spend.

I would look at a 2011-2014 Ford F-150 with the 1st Gen Coyote 5.0L V8 (2014 was the last year of that generation).  You can also look at 2015-2017 with the 2nd Gen Coyote 5.0L V8, but my preference is for 2013/2014 model year since it has fewer overall tech than the newer generation F-150s (and therefore less complexity/potential for things breaking), also being near the end of that generation should be the most refined/bugs ironed out.  Avoid any from model year 2018 and newer.

For more years to avoid see below:

https://carkiller.com/scottykilmer/qa/used-ford-f-150s/

2013-15 w/ 5.0 V8 and 6 speed tranny. That’s the only F150s to buy. 

What are you trying to do with the scan tool? You need to figure that out first.  Otherwise, for most people, a basic scan tool is all they need, and for that the Bluedriver is excellent (and works with your smart phone).  It is about $100.  I would buy direct from Bluedriver to make sure you are getting the latest firmware and not getting scammed (e.g. clones, etc).

https://www.bluedriver.com/products/bluedriver-scan-tool

Also, see here for vehicle coverage:  scroll down to “Will Bluedriver work with my vehicle?”

https://www.bluedriver.com/support