I don't know what possessed them to do such heavy discounts, but it sure seems like they didn't need to drop the prices anywhere near as much to clear that inventory.
From What I remember back when I worked Geek Squad, Best Buy has end of life agreements with some of its vendors and manufacturers. Once a SKU reaches the EOL date, a store pays for every day the old stock still exists. I imagine Best Buys warehouses work similarly. This can become costly very quickly if enough old stock still exists so a heavy discount to clear it out
may be a loss, but less of a loss than holding onto them and racking up penalties from Nvidia. Manufactures like Nvidia
do not want old stock sitting next to new, and this ensures it doesn’t happen. Board partners such as PNY, EVGA, MSI, ex…. Didn’t seem to have an EOL cut off, or at least they seemed to have a much longer time line as their cards would sit around much longer in the past.