Skyrocketing Prices

Hey all. Was looking up the going prices for G1 Jetfire and came across some listings for ROTF Jetfire. I was a little shocked to see the price for that figure so high, so I checked completed listings ( http://www.ebay.com/csc/i.html?rt=nc&LH_Complete=1&_nkw=transformers%20jetfire%20rotf%20leader&_fln=1&_trksid=p3286.c0.m283 )
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When did all of this happen. It's been a while since I've bought on ebay or even really seriously looked at the TF prices there. Really around $100 bucks for a sealed Jetfire, give or take $40. I really regret only getting the one when I found them on clearance.
Any other prices that have popped up lately that have been a surprise to anyone?

When did all of this happen. It's been a while since I've bought on ebay or even really seriously looked at the TF prices there. Really around $100 bucks for a sealed Jetfire, give or take $40. I really regret only getting the one when I found them on clearance.
Any other prices that have popped up lately that have been a surprise to anyone?