That's interesting - either it's a decent chunk cheaper than the bx70 or close to $2k more - depending upon which currency they are using. I'm seeing $9900 for a base bx1870 on the us Kubota site.Just noticed the Kubota Canada website has the 80 series already listed with a starting price of $11,879. Ofcourse it may differ from the US price.
https://kubota.ca/en/products/power-equipment/tractors/bx80