Most of the TV mounts listed are standard with standard functionality like pull, swivel and fixed. I recommend adding something like Pull Down TV Mount to give customers more choice when deciding on a TV and which mount to buy with the TV.
I want to purchased a pull down tv mount that can sit above the fireplace and I found a UK company called Tranquil Mount that is selling it. Has anyone tried them out. I had a look athe pictures of the product and it looks really good.