Damn, if I'd known about this I'd have chanced my arm for gear to bung on Ebay at a later date.
https://techxplore.com/news/2019-07-shoppers-amazon-prime-day-glitch.htmlThe worst that would have happened would be that they pulled a Dell and cancelled the sale. (They once managed to cock up their website so badly that ADDING extras to their most expensive laptop reduced the price to the point that £2500 worth of computer cost £56)