I wouldn't be surprised if they hit 230+ and stayed there for maybe a week after wildy is back, and then go back down to about ~200-210.
EVERYONE is alching right now. Not only that, but EVERYONE is also cursing, some both at the same time (like me). Souls and nats are going to skyrocket for a bit until this craze about getting ready for the wildy dies down.
Check out soul runes, they're going up even higher.
Edit: I bought 45k nats at top price two days ago, and right i did. If i had just waited until now i'd be paying even more. If anyone is planning on getting a hold of them, they're still relatively cheap right now. It's only going to hurt more later.
Edit2: Many people who are coming back right now had rares that they saved, which they're probably selling right now to buy the runes they need to level. Point is, nats are now worth much more than they used to be worth because you can actually do something interesting with magic now besides entangling chickens or whatever. I wouldn't expect the same cheap price of <200 to return any time soon, if ever.