Here's my two cents on the Narnia Pandemonium (or any item for that matter)...
An item is only worth what someone is willing to give. It's basic supply and demand. Right now the supply is low and demand high. The supply is getting larger by the day and demand while still high is decreasing. So...do I think it's worth Inferno, green flips, or stitch stuff, - no. Not to be a wet blanket BUT lets look at a couple things. Inferno can only be obtained through trade or a host game which is on rare occasion AND it's totally through an act of God that the numbers on the generators actually match and are in order. Green flips are a thing of the past and probably wont be released untill mid to late summer if they get re-released at all. Stich stuff will probably start to increase in supply as we get further into the summer from all the vacationers. Narnia teleporters are something anyone can get from home if they play enough. GRANTED it may take awhile to get them, the wardrobes seem to me like they will become about as plentiful as the gold monster doors.
SO...in my opinion, I think I would take alot of rare right now. As long as you're happy with the offer - TAKE IT! Why sit and wait for something that may never happen. Just my two cents on it. I hope you find what you're looking for. I'm thrilled with my teleporters and I wouldn't trade them. If I got another pair, I have a few friends I'd like to gift them to.