The Japan Mark Vs are excellent rifles. The Japanese know how to make excellent steel and forge it strong. I have had several Mark Vs, from Japan and the current USA model. Prices will vary depending on chambering, the model and the condition of the rifle. The Lasermark typically costs more than the Deluxe. They both cost more than the Fibermark.
Let me ask, why are you thinking of the 7mm Wea Mag, when the 7mm Rem Mag is nearly identical in performance, and half the ammo cost? My own current Mark V, is a synthetic, upgraded with a Bell & Carlson stock, chambered in .300 Win Mag. My favorites in the Mark V line-up are the .257 Wea Mag and the .300 Wea Mag. I never had to shoot twice, even at 525 yards...one-shot; one-instant kill.
Geno