I've got a set of headspace gauges on the way as I'd like to check things out before live fire. In the same package will be a NM front sight post - the standard sight that came with the gun is noticeably bent. Once I get things figured out I'll probably put in a NM rear aperture too.

What's the general consensus on 7.62/.308 ammo and the need or otherwise for an adjustable gas plug?

It's hard to say quite what the future holds; mostly I'm an informal recreational shooter as other commitments limit my weekend availability during the summer months. Accuracy is important, but I'm realistic and not expecting anywhere close to 1moa, even assuming I were able to deliver that kind of performance with open sights! I would be interested to learn more about bedding an M1icon, but I suspect if I spend some time with the Search tool I'll find the topic well covered.

I paid $950, which I think was fair considering the condition of the stock, the practically new barrel and the absolute lack of pitting anywhere on the receiver. There was only the slightest hint of rust on one of the smaller parts, and that wiped off with an oily rag.