speakers for old yamah mixer

a friend has an old Yamaha EM150 ss mixer with 75 watts.

She is looking for speakers to go with it that are not too expensive (less than a few hundred dollars), just something that could handle some power.

Where would I look for these?

Ebay has lots of stuff but is there another source to find out what model to buy etc...

ANY suggestions or information is welcome


Buy something of the same vintage as long as the surrounds around the woofers are good, Infinity, Avid, Bose, JBL...all for about $50-$100.