Newegg offers the DIYPC Ultimate Miner-V1 Steel ATX Open-Air Bench Computer Case for $29.99. Redeem this $20 mail-in rebate for the final price of $9.99. With free shipping, that's tied with last week's mention as $90 off list and the cheapest ATX bench case we've ever seen. It's compatible with ATX/Micro ATX motherboards. This case does not include the pictured computer components or a power supply. Deal ends September 30.