VMware Fusion 5 for Mac for $30 + free shipping
newegg offers VMware Fusion 5 for Mac, model no. FUS5-ENG-M-CP, for $49.99. Coupon code "VMF521" cuts it to $29.99. With free shipping, that's the lowest total price we could find by $17. It allows you to run Windows applications on your Mac equipped with OS X Mountain Lion or later.