Used Fiio E11 head-amp for $37 + $4 S&H

If of all the Fiio headphone-amps out there it is the Fiio E11 the one you want, it is available in “Used – Excellent Plus” condition for $37 plus shipping (around $4 for most zipcodes) at Adorama.com which offers a 30-day return window and a 90-day product warranty of their own. Used supplies are typically very limited.