I see everyone plugging n100/n150 deals but you can get mini pc's based on the 6500t for sub $150 easy and 9500t systems for low 200's
The n100 uses slightly less power but even if both are under heavy loads does it really make a difference even 10w difference is only ~7kw a month
Some people place a high value in warranty of new devices and feel the new devices will be supported longer.