I know both are worth a good deal, but it's the issue of how much. I remember tal armor's were selling for a metric hellton early on, but I'm sure the price has gone down. Is 2 ist a fair price these days, or am I asking too much?
As for the ele lifer, I have no idea, other than I should be getting ist+.
edit: ancillary question, but for anyone with experience, if one had two vexes, how many ists would one need to trade for a jah?