Spink list a 1935 unc florin at £50 I think that is a little high as well,but its probably for a bu. I'm not going to grade the coin from those photos. You could pick up a nice unc/ef at auction for well under half that tho.
And if its vf or lower then Peter the cat nugget eater is probably about right it'll be worth just above melt approx £2 but you might get a little more. All if buts and maybe's till you can get the coin graded.