thats how much its worth without the extras ive gt on it
You can spend as much as you like on customising a cocker, but if you can't sell it because you are ridiculosly overpriced then it isn't actually "worth that amount"
Rephrase it as i have spent "xxx amount", now make me an offer and maybe you'll get a sale, but for now buy yourself a duster because you are going to be polishing the dust off that gun for a long while yet.
No-one's going to pay £700+ on a s/h cocker when they can get a good one from £250-350 nowdays, i'm not knocking the cocker as i have one myself, just merely advising you to rethink your sales stratedgy, if you don't want to lose a big wad of cash then keep the gun, after all they are "still the best gun out there"