2007 ----->>> to current
I would wait a bit and trade in for a "newer" CPO... The best you can do is get a "close cosmetic" update but NOT worth it if you plan on selling on the "frankencar" in the near future... The upgrades, retrofits and reprograming might hurt re-sale more then leaving it as-is.
Now... that said.... I personally, upgraded the taillights to LED with "plug and play" units bought on ebay for $500, got the wood steering wheel for $400, IWC clock, and a few little extras, which can give a mild "facelift" and not break the bank...


