Pricing discrepancies when trying to purchase Parallels 17 for Mac (one-off)

Hi,
Not getting any response from support and the support chat seems down (stuck on 'please wait'). Anyone know if after-sales support exist with these guys?
I am located in the US and trying to buy the one-off product, advertised at $79.99. But when you click through it ups the price to $99.99!
Anyone know how to fix this so I can proceed to buy at the advertised USD price?
IK

 

Hello @IK_ , please follow the link https://www.parallels.com/products/desktop/buy/?full to purchase Parallels Desktop for Mac. Thanks, Parallels Team.

 

Yep - that's where I see this problem. So what about the solution?

 

Hello, please let y=us know which version of Parallels Desktop for Mac you are trying to purchase so that we can assist you further. Thanks.