Looks like his assessment of pricing is a little optimistic.
Scope, $200
Nikon ProStaff Riflescope BDC MT - Walmart.com
Rifle, $250
Savage 93R17 FV .17 HMR Rifle | Bass Pro Shops
rings, $30
Weaver Tactical Rings 48349, 48350, 48356, 48352, 48351, 48355, 48354, 48353. Weaver Riflescope Mounts, Rings & Bases.
The bipod is about right, no idea on the cheek rest.
From the looks of things, that setup brand spanking new is worth about $100 less than he says it is.
Add the fact that it is used, and I would guess it is worth around $500.