Caya, there's only several dozen high value items which people like to buy from vendors and resell on the market board at a high markup. SE could isolate the items down to just a few key vendors, like furniture vendors, and using a spreadsheet for items by vendor, tack on text stating that the item is sold by the vendor at vendor location for price in gil by referring to column with price.

Collectively, the amount of time people have spent googling what vendor sells what has likely added up to thousands of hours. Tabbing out is more time-consuming and more immersion-breaking than a little sentence at the end of item description popups.

Also, your mom is common sense.