You don't buy premix. You have to buy 2-stroke oil and mix it with pump-gas, race-fuel, or alcohol depending on how modified your shee is. As for a specific year, I bought an 06 new and if I had it to do over I would have found an older well cared for one that was cheaper and already had all of the go-fast goodies. But modin your own shee is half the fun. Expensive though.