Still present in 3.3.3 (Steam): female dwarf, selling the sword of Nonnak to Waldenbrook:
Ap:7 -- 14,637gp (AMW equipped)
Ap:15 -- 17,129gp (nothing equipped)
Ap:19 -- 15,679gp (pendant of beauty equipped)
while I don't expect linear behavior, it's odd to me that the price would decrease, instead of hit a cap, by gaining appearance.