Was looking at the recent Pioneer AVH-4200NEX on this thread for $360 after rebate (but anyone living in CA you have to also pay tax which should push it to almost $400).
Missed the deal but I kept searching and couldn't find a similar deal from an authorized Pioneer dealer to qualify for the rebate, but found similar deal for the newer Pioneer AVH-4201NEX. Main difference is the 4201 comes with a back up camera.
Anyway, ABT Electronics had it on sale for $509. I chatted with the rep online to also inquire about the older 4200 which he said they don't have any, but said they only have the 4201 and it was on sale for $509. Plus if I wanted to buy it now he would give me an additional $25 off. (You can also get the $25 off by signing up for email promo notification)
Anyway, final price would be $384 no tax and free shipping after sale price, $25 off and $100 mail in rebate. YMMV depending on where you live and if you get taxed and if you get the $25 off whether though chat or signing up for email.
Not a bad deal if you're in the market for a great stereo unit. In order to see sale price you have to add it to your cart. Good luck!
Pioneer 4201 info: