Realistically £900 I’d say no! but then where still back to what is a 5 year old frame and geometry to XC by today’s standards. Long,low and slack is the order today. Not tall,steep and short which your frame is.
Keep the gears and brakes and just out the frame forks and wheels cheep.
I’m the same as you always have XL frames and have always had to suck it up and sell them cheeper than I want to!!
But I’m realistic I realise that being tall in the bike world is always against me when reselling.
Out it,out it, out it just get some cash back in the bike fund bank.
Sorry to be so blunt Renton I do feel for you.