Yeah but instead of undercutting if everyone kept the price around the same (like 1 gil under isn't gonna make or break the market thats fine) then everyone would be making good money and its all win win. The more people undercut the lower the price drops and faster...

but on my server I see people selling stuff for 200gil when everyone else has them up for 5k and last sale 5k. Those kinds do hurt themselves unless they enjoy having 200 gil fast instead of 5k >.>