I keep getting the impression that people think that to move spawners there should be a very high price, i.e. the cost should be nether stars or greater. Why? With 15 stacks of cobble I can make a vanilla mob grinder that will give me 30 levels in 15 minutes. I've made this so many times I'm bored of it and would like the option of moving spawners to make something a bit different. I'll admit that JABBA's diamond dolly is a bit on the cheap side, but by the time I have a nether star I've already made my dark room out of cobble and have better things to do with nether stars. Now, a cursed earth blaze spawner is OP, but that's cursed earth and you don't have to move the spawner for that to work. I can see requiring some ender pearls, blaze rods and maybe even a ghast tear or two for something that can move spawners. Why should it be more expensive than that?