2005 Seat Ibiza cupra 1.8Turbo

Hi everyone. My sister has bought a new car to replace her 2005 seat ibiza cupra 1.8 turbo (bbu engine 5 speed) she's owned it 9 years and is the second lady owner. Full main dealer seat service history up to 2016. Current milage 86k. Reason I'm asking what it's worth is they are quite rare and comes with the big brakes and a huge seat sport intercooler. Interior is virtually immaculate with cupra stitching on the seats, leather steering wheel, CD changer, aircon blows ice cold etc. Runs and drives perfect. I suspect it needs a handbrake cable as the lever has virtually no travel but mechanically that's the only fault (which I would sort if it's worth it. I'm in the trade and would like to sell it complete for her rather than break it. Bad point and this is the big one. 7 years ago a lorry side swiped her causing damage (cosmetic Not structual) to the o/s/f wing, door and quarter panel. My mate who has a body shop replaced all the panels bar the 1/4 panel. The 1/4 was pushed out and a light load of filler applied. 7 years later the paint job looks curse word up close, it's solid but with a cellulite look to it. I would like it sold complete but no idea on a price. Shame to break it. Any advise would be appreciated and sorry for the long thread. If I have a rough price I will put it up on here. I know it would make a good donor car.