Opening bid $70. Blades look like they have a lot of sharpening life left; a few scratches are worth the savings.
http://www.ebay.com/itm/A-Pair-Of-MK-Profesional-Freestyle-Figure-Skate-Blades-/151030163512?pt=LH_DefaultDomain_0&hash=item232a196838
There's a pair of coro ace's in the same size starting at $25.. also look like they have a decent amount of life left :)
http://www.ebay.com/itm/140955650993
I know someone was looking for MK dance blades - there is a pair on eBay currently. 9.25"
http://www.ebay.com/itm/Figure-Skating-MK-DANCE-BLADES-Size-9-1-4-Sheffield-SteEl-MADE-IN-ENGLAND-/140958729561?pt=LH_DefaultDomain_0&hash=item20d1cb8559
MK Dance - Better price -larger size. (11.5")
http://www.ebay.com/itm/mk-Dance-Model-11-5-Size-New-Never-Mounted-/200916861039?pt=LH_DefaultDomain_0&hash=item2ec794006f
These aren't new, and they come with boots, but nice pair of adult-sized MK Phantoms for sale on eBay - 10-1/3"
http://www.ebay.com/itm/Womens-Figure-Skates-Sheffield-Blades-White-Harlicks-1-4-Leather-Boots-61-2-/290920263606?pt=LH_DefaultDomain_0&hash=item43bc32efb6
$350 isn't a great price for just the blades, but if they don't sell, they might be relisted for less.