I'd love an excuse to burn marks and glimmer on a wider variety of goods. What would also be nice is if we had a Bazaar of guns and gear in the area of the tower the Iron Banner sets up.
Once a month there needs to be stalls of older equipment and interesting vendors. Toss is some fun vanity items and whatever else have you, and you have a regular money sink.
And of course, this should be a limited time gig with wares that rotate, but with wide selection.
Hopefully the Tower isn't zoned in such a way that we couldn't have an interstellar flea market.