I don't know about the rest of you, but I really liked having that Christmas store for selling off drops quickly. I think it would be nice to have something permanent, as it's a good way for everyone both new and seasoned to make a couple extra mesos for potions and such.
I've suggested this before, but the general consensus is that it would make the game too easy. I've also suggested that a portable merchant store (the cat store from the cash shop) should be in the game for a fee as a money sink, but haven't heard much from that either. http://royals.ms/forum/threads/money-sink-ideas.16062/ Which ever does get passed, I am 100% behind this.
It doesn't really make things too easy, you never make too much money off of equips, it just kinda covers pots and gives a little leftover. And considering how few maps there are for good training, it's horrible to lose your map just for a few mesos. It also kinda boosts the economy a bit, and makes it so people can sort through their drops better and see if any of it's godly. I do like the idea of a portable merchant, I'd definitely buy it, even if it were a donor item.
It's not a permanent item. It's a one use item like a Smega so I don't think you'd waste your RP on a consumable.