TBH mate, I think even £180 is stretching a bit
Are the ESC and motor included? If so then £180 is do-able but if not, the going rates roughly break down like this:-
B4 will get between £80-£100
Transmitter maybe £10
batteries approx £15-£20
charger £5
I know it's not good news but sadly that is probably going to be the end result. Maybe best to keep hold and just use it every now and again?