It's hard to say if the PS Vita is worth buying unless you are the one buying it. I am a 50 year old grandmother so to me, it wouldn't be worth buying. If you really want a new game system and you have researched the value of the PS Vita and still want it, then it is worth buying for you.
"As with all vehicles, the worth can vary depending on the condition of the interior and exterior. Buying a used 2002 Chevy Malibu from a private seller will run you somewhere in the $4000.00 range. When buying from a dealer, the price will be inflated."