About ''BIND'' items

Maybe on only some items, such as the fly scrolls, and only certain binds, such as selling, not trading. As this is the first MMO I have ever played (and I am oblivious) I didn't see some stuff in my inventory, and I didn't see the numbers on my fly scroll. I thought that I could only use one once, and so, now at lvl 48, I have a crap ton that I feel a bit bad about just pitching them... Also, I have three of those little hover cars... Idk what to do with them... I bought one to trade to a friend who got rid of his when he learned fly, and now I can't even sell it back.

pretty unrefined this bind system I gotta say...