Trading is restricted to the bazaar, so price checking outside of it is not probable.
But I hope an easier way to price check will be introduced eventually, because it goes along the main LE concepts, which is:
Clicking through UI to search for items is not killing enemies (our wrists are not our enemies), so I expect for some convenience to be added to reduce the amount of clicks and the time spent at the stall. Like clicking on an item mod or clicking on a unique name to add them to the stall search filter.
But maybe favor will be balanced in a way, that we won’t be able to sell many items, and occasional price checking of high LP uniques and T7/some T6 exalteds will be enough.