Today only, Beach Camera via Newegg offers the BeyerDynamic T90 Audiophile Headphones, model no. 716758, bundled with a $40 Newegg Gift Card for $299 with free shipping. Assuming you'll use the gift card, that's $40 under our September mention, a low now by $210, and the best price we've seen. They feature a 5Hz to 40kHz frequency response, Tesla transducers, 250-ohm impedance, microfiber ear pads, and open-back design.
Of note, American Express cardholders can also bag a $25 statement credit with this purchase, as detailed here.