Are coral good value for money in there upto 40% of sale, quoted £6250 for 3 sash 3'x5', 1 top opener 3'x5' with trickle vent, 1 side opener 2'x30'', 1 4 panel bay window 4'x8' with 2 side top openers and 2 side front openers, all windows with toughened glass, 2 doors 1 with side panel other...