I've already re-iterated this elsewhere, but the next IDP update is going to cause an interesting change in the chest shop system. I am going to make it possible to not only buy items from a chest shop and pay with vT, but sell items to a shop, and gain vT (if the seller has enough vT, that is).
Not only that, but I'm going to start using vote, referral, and PvP points as currency too. I am re-coding the money system so that we can integrate not only valutas, but these points, within the current system.
This allows you to sell items for vote points, for example. This should make things real interesting, as these types of points are more valuable than vT.
Putting both [Shop] and [Sell] as the first line on a chest shop will do the same thing. [buy] is going to be the format for selling items to a chest (the correct definition is a chest that buys items).
It's as if we're making a huge change to sign shops, when sign shops are only a minor part of the shop system, which is still not even close to being done. But, when all is said and done, we will finally have some use for points, and can easily integrate them into other areas of the server as well.
The IDP Dev Team