You said the rifle was bought new between 2002-2004, so you have in your hot little hands a FOR REAL, built in Birmingham, England Webley Tomahawk. While I don't know every last bit of info about Webley, I do know more than a bit and the company went into receivership, aka bankruptcy, in 2005. When the dust settled, all the rights, equipment and leftover parts were bought by a company called Highland Outdoors Group in early 2006. Everything was sent to Hatsan in Turkey, who used the last of the parts to build the last of the real Webley rifles. Everything since is nothing more than a pretty Hatsan Model 95. I should know, I own 4 of them and the one in Septicdeath's pic above is one, custom made internals and an LW .20 caliber barrel. Pretty rifle but still nothing more than a tricked out Model 95 Hatsan which I also own a couple of...lol.
Anyone telling you $200ish is giving you what a Turkish built Webley may or may not be worth. That for real UK built Tomahawk you own is worth bare minimum at least $450, then add some for the BKL scope mount, Swift scope, custom moderator and a bonus that you still have the ported muzzle break they came with.
Personally, I wouldn't take anything less than $600 since like boscoebrea said, in the States, that Tomahawk is a quite rare rifle and not many who do own one will part with them and if they do, they fetch quite large prices, well worth every penny and quite a bit more than the $300 you said you were hoping to net for it.
