Woot has Corsair 4000D RS Frame Modular High Airflow Mid-Tower PC Case (Black or White) on sale for $79.99. Shipping is free for Amazon Prime Members (must login with your Amazon account and select a shipping address in order for Woot to apply free shipping) or is otherwise $6 per order.

Thanks to Deal Hunter tDames for finding this deal.

Available Colors:

Features:

• The revolutionary FRAME system gives new meaning to the word customization. Want to upgrade the motherboard tray to billet aluminum? Want to swap out your front I/O panel for more USB ports? Now you can. A case that can change and grow with your needs (or just your mood). The options are nearly limitless
• High-performance fans pre-installed in the front of case. Support daisy-chainable 4-pin PWM connections and Zero RPM mode for near-silent operation at low loads
• This steel multi-point mounting system offers unmatched flexibility in front and roof fan configuration. Simply slide the rail to mount fans up to 200mm (140mm in the roof) wherever you like, ensuring targeted airflow without fixed mounting constraints
• The internal side panel near the motherboard tray can be used as a cable cover for clean cable management, or you can remove it and mount fans to the side for increased cooling potential
• Optimized for high airflow and minimal restriction, the steel front panel is perforated in three dimensions with a Y-pattern that provides a low-obstruction path for cool air​