There are many jita warriors doing 1T+ turnover every month. So shaving off 0.46% on all your sale orders, and potentially making more convenient buy orders (station only range instead of 1 jump from Peri) IS a considerable money saver. This bean counter would pay back in no time.
Ofc you can make your own, but why bother.
fwiwi, WTS Jita trading alt Standings are perfect, WTS THE BEST Jita Trader Perfect Caldari Standings +10, Jita trading alt with standings and trade skills