Each dealer is different; go figure, but I paid $5+ tax for one of the pieces. Slipped it on the sash and screwed it back in, so now things look much more uniform.
Remember, this is just the adapter, not the entire sash trim piece. Just the one that needs the adapter to be able to screw in at the top of the door.
By the way, if you were looking to get the best possible appearance out of all of your black plastics, rubber hoses, dash, steering wheel etc... I picked up this 303 Aerospace Protectant product at my local ACE hardware store.
I searched it out after checking out this guys article on another site. I don't know about the other product, chemical guys, but the one 303 product works great. It was $15 at the ACE store, but worth it. The interior of the engine bay is looking much cleaner because I used it to clean/protect the dirt old looking hoses that made it look like the car had been into mud bogging. Also, the sash trims look as close to sleek as a 20 year old car can look without buying brand new parts left and right.
I did clean the rubber hoses gently with some soap/water after ringing a rag out well, so as not to let water be flinging everywhere towards electrical parts.
http://www.detailedimage.com/Ask-a-P...ur-engine-bay/