I've never heard it, and it's aging, but the Musical Fidelity X-Ray CD player fits your size and price (used) requirements and gets good reviews.
http://www.stereophile.com/cdplayers/1204mf/#Ai0MikbQ6oGeZ1Z3.97
http://www.stereophile.com/cdplayers/1204mf/#Ai0MikbQ6oGeZ1Z3.97