I did well on my 2010 back in late October. Managed to get close to dealer invoice and with security deposits, the interest rates were under 1%.
Lexus vehicles hold their value better than any luxury brand, and you will see this evident in their leasing schemes. I've found leasing/buyout to make more sense for me on Toyota/Lexus vehicles. You can consider it like doing a balloon payment from BMW and other brands.
Anyways, you will still want to get the consumer reports price report for the cars you are considering (assuming you live in Canada/US). That will break down MSRP, Dealer invoice cost, incentives available to the dealer, etc. Expect to meet the dealer half way between MSRP and invoice, then subtract the incentives.
Also max out the security deposits. Every $500 reduces interest rates by 0.2%, meaning you can get down to 0% lease rate for 60 months. Your security deposit is returned to you when the lease is up.
I'm surprised you found a 2010
You won't be disappointed with the quality of the car versus the competition.