Trav: if you are looking at an 'out of the box' custom rifle that uses Sako actions and Kreiger barrels you are probably looking at a rifle valued somewhere in the $1,000- $1,500, at least......and this could be a low estimate, easily.
Precision composite stocks might run a couple of hundred $ but it is the action and barrel combination that is most costly. The SAKO actions are incredibly smooth and strong; Kreiger barrels are a known quality custom barrel. The 300 Win Mag is a great caliber. This is a win-win-keeper-keeper in my book.
None the less, try and get a coule of opinions on its value and decide from there. Mikey.