Originally Posted by PurpleAngel
Gemini HSR-1000 (Takstar Pro 80) closed headphones, sells for $50 on eBay.
I'll second that suggestion (same drivers, evidently, only in a closed design). Another option is the Sennheiser HD428, available refurbed on ebay for $25. I have both the Takstar Pro 80 and HD428, and find them to be rather similar. I think I prefer the HD428 even, it just seems a little crisper and clearer (although this may in part be due to not having an amp). As to comfort, I found them both very comfortable; the Pro 80 is cushier, but also heaver and has a slightly stronger clamping force. The HD428 is much lighter, which makes it easier to wear for longer periods and to transport to/from the library.