(I didn't put prices on these, but I would expect them to be expensive)
Barber Shops/Hair Salons - Change your hair style/color (add in new colors [and possibly styles later on] that can't be chosen at the beginning).
Rare Dye Vendor - Dyes that are automatically applied and not sold by the bottle (as not to be resold) - These colors should be near impossible to create on your own and apply straight to your armor/weapon of choice upon purchase.
Aura Vendor - Basically just for show - Purchase different color auras, simliar to those from the C.E. - a code is given to you from the vendor that is unique and works only for that character (which makes the C.E. aura still have something special about it).
Gambling Item Vendor - an unidentified common (white) weapon/shield/foci that you purchase and identify - possibly giving you something nice based on your character level. (I know it's a D2 steal, but heck it was a fun system). :D