I got one of these a while ago and have been hanging out to get one for a family member. Reliably, it goes on sale every now and then and is on sale now.
It is a great product! I like that you can refill it at home, also it doesn't use a chemical aerosoliser. Very good for getting oil distributed for a salad, or vegetables for roasting, etc.
$7.5 is not an ATL but it seems that the price has been gradually inching up for past years - I think the days of $6 sprayers are behind us.
EDIT: It has now arrived. This is in fact a different model to the one I currently have. I haven't actually tried it but it doesn't have the interior plastic bag.
@GregFiona: The one in the video is v2. It has a bag which isn't attached to the wall of the bottle. I have that one and it's a bit of a pain to refill but works well when spraying.