the 9*9mm is the metal backplate of a fet. Show me an board from ebay which is better an delivers equal usability...
I paid less than 100EUR on my WPS, sensors included and got one premium software with it
. I don't think that you can get some existant testequipment for that price, that can do the trick so easily, generates graphs and everything for you, can regulate the fans, the heatsource etc. by software.