It's worth what someone's willing to pay. The thing with sniper rifles is that these days there are several brands that will get the job done.
A great example is the gun on top in the picture...that setup, Howa 308/Nikon Monarch 4X16X50, can be purchased for $1,200.00 +/- a few dollars. It's a proven gun, and you don't have the headache of a pieced together custom.
That's just my $.02. I'm not a gun freak, but a own a bunch of em, and love to shoot.