2007 IS250 headlight goes off and on
 

For the last few days I see that the passenger side headlight comes and goes. Dealer says replace both bulbs with HID bulbs. Cost at $390 per head for a total of $780. That sounds steep.
Any suggestions on what is a better alternative please?

There are actually plenty of options for your situation, but the main thing is, you need to figure out wether its just the bulb thats going out or the ballast, or both. We can provide really great options for you for either and you can find them in our webstore.

For me, will go aftermarket HID kits, cost around 100 bucks or less.