I can tell you when i get an email back from the i emailed them yesterday about what there pricing was. Damn i seen the pricing too at car audio shop by me, i wanna say like 100 something, im not to sure. i can tell you when i get an email back from them if you dont already know by then.
Canaan can tell you the price for DD's, the shop where he works is an Authorized Dealer. A while back he said he could sell me the 1508's for $135 each.
i am looking to put two in a 2 cu. ft. slot ported box behind the seats of a single cab gmc sierra. should wang pretty nicely. dont know if my amp will be able to keep up though. i have a autotek ss550.2 i think its 275x2 at 2 ohms and 225x2 at 4 ohms. but i am looking to upgrade soon anyways.