The Microsoft US Store is selling the Lumia 950 for $399, Lumia 950 XL for $499, Lumia 550 and Lumia 650 for $139 and $199 respectively.
According to Windows Latest Microsoft wanted to flog as many Lumias as possible until stores ran out of stock, but it looks like the plans have changed or the company is selling the remaining stock which they recently discovered. So if you want one you might have to be quick.
There was nothing wrong with the Lumia other than the fact it was not Android. It has a display size of 5.7, display resolution: WQHD (2560 x 1440), a 3340 mAh battery which could be replaced, fast charging, and an octa-core processor. It is sad that Microsoft got cold feet on Windows on Mobile because it was rather good. Anway, there are a few still kicking around if you want to see what could have been.