A good friend of mine is selling his HK91 A-2. It's test fired from the factory only and has a ton of extras. 1979 gun and he's the original owner with original test target and the following extras. Unissued Henzolt Fero Z-24 scope and mount. All steel bipod. 1,200 meter rear sight.4th Gen. PSG1 grip. Carry handle. Port buffer. Bayonet. Magclamps (2). Extended butt. 20 original 20-round mags, both steel and aluminum. All new. He also has an originak HK transport case thats unissued in new condition. I've see it and it's 100% no scratches and so clean you could eat off of it. He wants $4000 for it. Is that a good place to start for a piece this nice or would he be better off to part it out? Thanks in advance for the assistance.