Is it fair to compare new to used though? Also how about power consumption, if it’s on for 5 years each watt costs £13, so for something that will be on a long time power is actually quite an important consideration
Can you get those as cheaply though? Can understand getting something other than a pi as you don’t need the GPIO but are there any good alternatives that are cheaper? If not may as well go for the pi
Typically how close is the TDP of the CPU to the full system power draw? Can see a few refurbished on ebay that don’t look too bad