Add the ability to watch marketplace listings

1000000 switch at sold out in 2027

I agree with this feature request 100% especially when you find a good deal in the marketplace

This can be an extension of the wishlist (you get emailed when listings go live that are under the tracked price).

This extension you describe already exists.  Any items in a wishlist that get listed on the marketplace at or below the market price, will generate an email notification to users.

Please describe more about how this feature would work/look on the site?  

I'm guessing something like this:

You would click "watch" button or link or something on any particular listing on the marketplace.

Then there would be a page showing all the items you have watched and their current status

You could remove items from the watch list from this page or from the listing details page too