As one of its daily deals, Best Buy Computing Clearance cuts 20% off sitewide via coupon code "BDAYCAKE20". Plus, most Computing Clearance items are eligible for free shipping. (Free in-store pickup at Best Buy is also available.) That beats our May mention when we saw 19% off and is the best sitewide percent-off discount we've seen from this merchant since late April (when we saw 25% off). However, this is part of a series of daily deals that will increase the sitewide discount until it hits 25% off. Note, quantities may be limited.