Do you have a link mate. Was quoted 80 each round here as the cheapest fitted hence having to put part worn on. And a search didn't throw anything much cheaper up. 195 80 r15s
I get my tyres from Tyreleader and have them fitted locally.
https://www.tyreleader.co.uk/car-tyres-195-80-15/?orderby=prix
195/80/15 is more expensive than the more common FL1 size of 215/65/16 though.