Beyerdynamic DT 770 Pro 80 Ohm Wired Closed-Back Headphones $104 + free s/h Buydig has *Beyerdynamic DT 770 Pro 80-Ohm Studio Reference Closed-Back Wired Headphones* (Black, 474746) on sale for *$103.99*. *Shipping is free*. Buydig also has *Beyerdynamic DT 990 Pro…