Amazon has a used T1 for only $779 from what looks like a trusted 3rd party seller.
Not to shabby
Multiple pairs of HD600s fulfilled by AWD for under $300.
Brand New AD900x with US warranty for $184
Buydig has dropped the price of the AD900x back to $199 and you can apply the 30yrshotdeals15 coupon for a further $15 off.
The AD700x has also dropped to $130 less the $15 with the coupon makes it $115
You can knock the AD900x down a little further if you buy with a filler item and the "30yrshotdeals25" coupon
Ex - with this cheapo headphone as a filler the price is brought down to $179
Used HD650s, VG condition for $300 on AMZ.
Shure 840 and 940s 25% off on TTVJ's Deal of the Day. Putting the 840 at $150 and 940 at $229
ATH ANC25 Noise Cancelling phones 60% off, rendering a price of $40 on buydig.
Refurb UE6000 for $100 on Newegg
AND, btw, the sale on Sansa players at Woot.com ends tomorrow.
Beyerdynamic T1 for $1118 from Amazon.com (Amazon is the seller)
Beyerdynamic T70p for $283 on Amazon Warehouse Deals
HeadAmp is selling Sennheiser and Fostex headphones now and they're doing free overnight shipping with coupon code NEXTDAYSUMMER.
Also, I just noticed they're selling the HD598 for $25 off the list price.
the HD598 was an error which i fixed. but the free overnight shipping is true. and free international shipping, which is unheard of. the best deal nobody knows about :)