Justinia's Favour as an honorable mention, being the only gloves granting +1 bartering
Especially as you can go and get them immediately on landing if you know where they are.
Gareth's dads dagger for the thieving point is good too. Is that the only +1 thievery weapon? I think so.
There are a few good things dotted around (lots in Arx) - it is just if using them routinely (rather than for specific tasks) they become useless compared to vendor wares once you are past their level.
