bathroom window replacement cost?

[whoimi]

Hey, how much would you say it would cost to replace this Bathroom window?
Very old and the top part is damaged (had a guy try repair it but the way it was done originally misaligned and all) so suggested get it replaced as its over 20 years old

How much would it cost to replace something like this?

 

[crank39]

Oooo an old coldseal window from the 90s, I don't price or fit windows but I'd imagine £500-£600 supplied and fitted and rendering made good