The ones under $100 are aftermarket ones, such as the one in the videos. The OEM one has one connector that connects to another connector right below the sill when you take it off and is a 1 minute install vs 15 minute.Yep, that's who I bought mine from. Came quickly too, very fast shipping. He's lowered the price. When I bought mine from him back in August. I think I paid $85. It's crazy to see dealers still charging $200 for these...lol. They are definitely NOT worth that retail price. But for under $100, I think it's nice.
If you DO end up doing the rear, definitely post pictures and a how to! It's annoying to me that manufactures skip out on the rear door sills. All 4 should be illuminated.