Dragerking

I'm interrested in buying a 2012 gl350 bluetecs, fully loaded, I was wondering what would make the best deal for a lease. As well, what did you guys do to win over the dealer to give you the best deal. Any tips or advice. As well what is the averaged payed on the 2012 GL350. As well, i'm interested in the 2012 MlL350, and what is the best deal for this sub. Thank you so much for taking your time to look through this. Thank you