This might be the most retarded thing I've seen since Candelabra:
http://magiccards.info/ds/en/148.html
$55 for a Mirrodin card?!
It's a confirmation of the "herd mentality" running rampant in speculators these days. As soon as something is nearly sold out, one of the few stores with the card remaining in stock will jack the price up to obscene amounts, and the rest will follow suit.