A:Answer That's easy. Just buy the open box model, there are several listed on the site, then buy your 512 SSD and either have BB install it for you (not sure they will, must ask), or do it yourself. There are plenty of YouTube videos that can show you how to do it.
SSD itself should run you around $170 before tax for the Samsung 850 evo 500gb m.2 2280 ssd.