Each item has anywhere from 0 to 3 numbers listed. For ease of use, all numbers are colour coded, here is their function.
140k - Numbers in black represent the price that an item is sold for in store, otherwise known as the 'NPC price'.
150k - A number in red represents the lowest price for that item.
200k - A number in green represents the highest price for that item.

Prices are generated from items bought and sold on BasilMarket.com. A price range is given because sometimes items are below average and sometimes they're scrolled/above average. Prices are only available for items which have been bought/sold on BasilMarket.com.