Different guys must do different values and work to different rules lol
I had some one from Southampton look at mine as the 2wd saff guy is in Scotland?
He told me they don't take mods into account but will add an amount on if a lot has been spent like with mine as it has up rated brakes gear box and diff so he valued it at 8 grand.
Which he said was a high value for a g reg saff.
Now I've re done the head lining had new seals fitted and I'm building a new engine I'm going to take this up with them as a lot of you guys are saying mods are taken into account