Deneith has an arms place for weapons, one for armors and they all sell only +1 items. Pretty pointless and unfrequented.
Fair trades is a weapons pawn and hence has a lot of patronage.
To get these old places happening again I suggest a few things.
1) The missile seller in the weapons shop should sell NORMAL crossbow bolts and arrows. So we dont have to go to the market to buy normal arrows. (since +1 ammuntion does not stack with a +1 bow)
2) Put speciality sellers that are linked to the pawn shops, but are effectively FILTERS for certain types of weapons. (from the same weapon lists that fare trades uses)
Dragon tooth sales could have these sellers:
Like exotic weapons seller should filter out ALL the exotic weapons from the pawns of fare trades.
A guys that has a filter for Finesse only weapons.
A guy that sells two-handed weapons.
A nomad barbarian salesman selling True Chaos, Anarchic weapons only.
A simple weapon salesman for mages (staffs, daggers, clubs etc)
A throwing weapon salesman.
You could have a guy in the temple of sovereign house temple that has a filter for "pure law, axiomatic, pure good and holy weapons" only
3) Likewise Lion's head armoury should look at the stock in house k's second gauntlet goods and have sellers that filter on other things.
A docent only salesman.
A Heavy armor sales man. That filters all the goods from second gauntlet to show you just heavy armors.
A Medium armor sales guy
A Light armor sales guy.
A shield only seller. (*filters all shields from second gauntlet goods*)