Better to buy new or used?

#3
If the item is good with latest technology or can upgrade, then go with old system. I would suggest old because it can save some money, but look it should be utilized.
 
#4
You can bbuy old one if it has latest model with smart price else go with newest one as we see EV vehicles at the moment so newest is the best for you.
An example Old CRT TV with LED TV.