well its got an egrip and a ripclip on, there the two big upgrades, not sure if thats a apex tip or just a mock suppressor, the plastic stock and rails/covers/laser or flash light aint going to add much value to it all.
and im not the best person to put a price on it, as to me, its not worth much when you can pick up a mini for 100 which will out perform it in every way, to a milsimer they might pay good money for it, but its ageing kit, you'd get more if you split the ripclip n egrip and put the bt back to standard, a working bt in that condition £40??? as i say ive not been paying much attention to the price of this sorta stuff lately