I have 4 of these in like new condition that I bought new 2 months ago. They are probably not even broken in yet. $35 each or $130 for all 4 + shipping.
You can see the specs for these from parts express here:
Parts-Express.com:Eminence Beta-10A 10" Guitar/PA Driver 8 Ohm | beta-10a bass guitar driver keyboard speaker pa woofer pa driver
You can see the specs for these from parts express here:
Parts-Express.com:Eminence Beta-10A 10" Guitar/PA Driver 8 Ohm | beta-10a bass guitar driver keyboard speaker pa woofer pa driver