Sentence:  Howard: You're gonna feel terrible when I'm in a wheelchair. Which, by the way, would fit easily in the back of this award-winning minivan. / Bernadette: Fine, we'll go to the E.R. Just stop <WSD>selling</WSD> me on the van. / Howard: You're right. It <WSD>sells</WSD> itself. 
Meaning of the word marked with <WSD> tags:  To promote a product or service.