depends on parts.
stock - about £100
with the adjustable stock +£20
suppressor barrel +£30
rails +£5
epiphany upgrade +£20
aftermarket board +£30 or more.
to give you an idea mine went as follows:
sp8 with full epi internals, rails, adj. stock, blackheart board, CP trigger, used well, for £200 all in.
sp8 with adj. stock and rails, used once £120.
you might get more, but i was looking for quick sale.
you could try selling on our forum
www.scottishwarriors.co.uk, or try
www.ukscenario.com or
www.walkonzone.com as well as here as they are all more scenario tilt.