1. I found out through this forum you could check mb information for items you plan to sell with your retainer. Before then, I'd run back and forth between the bell and board to figure out how I wanted to price things.
2. I'm usually pretty cheap and will sometimes travel places by mount instead of using the aetheryte. I just found out I could travel from Gridania to Ul'dah for free going through the gold saucer. I've made that trip on mount so many times and now I can do it with just a few clicks, lol