Me when I don’t know about economics:

Because the highest buy order someone has placed is 730 and the lowest sell order someone has placed is 1400.

Its a player market, those are people’s buy and sell orders. You can also set the order for what price you want to sell or buy it at. When its low population there tends to be a lot more discrepancy.

That’s why you always check. You can set your price it will just take a bit longer to sell

Welcome to the POE stock market. I make hundreds of divs a league through arbitrage and being a market maker. The spread is really big because there are less people this late in the league and the volume has dropped.