my son is three and needs a sled he keeps trying to take mine. what are they worth new and where shoulld I look. also is it something that is safe to buy used

absolutley safe to buy a used 120... 2000 is the 1st production yr of most of the newer 120 4 stroke sleds but there is always a kitty kat 60 cc 2 stroke..

a used 2000 yr sled could bring any where around 1000 - 1200 US $ depending on condition..

I found that the 2 Polaris 120's we had the clutches needed to be constantly cleaned and maintained..
but other than that pretty bullet proof little sleds..

new they are up around $2100.00 US