Just bought a 2015 EzGo about a month ago.... runs great and the brand came highly recommended.. if I bought again, I'd look at used, but only most recent years that provide the AC continuous power...a lot of the older golf cars struggle on hills. You could save a lot of cash buying used. Make sure batteries are new or relatively new because they are pricey.
BTW, my EzGo will hit 23mph... today it ran at 20mph with DW and 2 dogs riding along. Older cars can be modified to go up to 30mph or so.