Endpoint Not Returning Products

It seems like http://api.tcgplayer.com/v1.27.0/pricing/group/1689 is not returning any products, but http://api.tcgplayer.com/v1.27.0/catalog/groups/1689 shows that group 1689 does exist, with the set name being Revised Edition (Foreign Black Border). I looked on TCGPlayer to see if there are any products in that set, and indeed there were.

Why is it not returning any products?

To pull pricing for this set, you’re going to want to grab all of the SKUs from the catalog and pull pricing individually for the cards.