you mean you purchase it on a LOD char, then convert the char to rotw, and then you can do the runeword in non ladder rotw?
does that mean that ZOD and cham prices will not drop?
yes, people buy items on LOD, then convert those items to ROTW. lod sunders are the most obvious example of this.
idk about the prices in the future, my guess is they will go down again at some point. but I am no financial expert. or expert of any kind really