Hi MacCullum, here is some info for you,
A 30"x 8 Blade brand new, (are you sitting down?) $721.00
A sharpened and reconditioned 30" x 10 Blade (5.640" diameter) $220.00.
Hoping this is of help,
cheers2

Please do not PM me asking for support. Please post your questions in the appropriate forums, as the replies it may receive may help all members, not just the individual member.
Kindest Regards, Darryl grin