Pretty much what is faster...
running through one zone?
or going from ward one ward to another? as most ppl don't sell in the correct wards anyway (as from what i'm told) like say you go to the ward for food do a search for a meat dish turns out the cheapest retainer is selling 5 in a ward far from ya. Now you gotta run to said ward. enter it then wait for load and find your retainer. and in that time all five were baught from someone looking for a different item and saw those.