Re: Is the PSG1 worth the effort to find or clone?
At one time, the PSG-1 was the standard by which the world's precision semi-auto rifles could be judged, but many, MANY years have since passed and products have been developed with considerable emphasis on accuracy and reliability that make the PSG-1 (and clones) great collector rifles and for those who simply WANT one, but far from ideal or cost-effective for the masses. The accuracy standard that HK guarantees with all PSG-1's is 50 rounds of match ammo into an 80mm (3.14") circle at 300m. 50 rounds...not a 3-shot or even a 5-shot group. I have never seen one that would not exceed that guarantee with proper ammo and a shooter that knew what they were doing.
Now the BAD news...the money you pay to get what you get from the PSG-1 in terms of performance is excessive to put it mildly unless you have unlimited funds and no other options at your disposal. For a good condition PSG-1 (factory, with accessories) you will pay anywhere from $13k and higher. The problems with the PSG-1 is that an off-the-shelf, modern semi-auto 308 AR-variant at 1/6th the price (or cheaper) is capable of meeting, if not exceeding the same level of performance you can achieve with the PSG-1.
Building a PSG-1 clone can be done (by the best builders out there such as Urbach, IGF, etc.) for roughly 1/2 or so the cost of a complete factory PSG-1. Still though...you are talking about 2.5-3x the price of a quality custom AR-10 type rifle (or a high-end commercially available alternative) that will shoot as well, if not better, in terms of accuracy and reliability.
Another thing...have you actually had a PSG-1 in your hands? Other than just drooling on one or finger-f--ing it at the gun show. I mean pick it up, get into position with it, move it around, haul it further than 100yds? If so, I would think you'd realize that they are roughly 18lb rifles (equipped with the factory issued scope/mag.) and they are LONG with their nearly 26" heavy barrels. They are FAR from ideal hunting rifles. If you want one just to have one, then by all means...they are great rifles all around. If you want one that you actually plan on dragging into the woods, beating up in competition, etc., I think you'll fare better with a clone rifle (at least when you drop it, bang it up, scrtach it up, etc. you won't feel quite the same tug on your heartstrings and your wallet).
If you want more background, performance results, clone build-out info, etc. on the PSG-1 platform, I suggest that you consult the HKPro forums.