I have a set of M960s in (I would say) the same condition that I was about to install. I'm not sure why I'd swap particularly but might potentially be persuaded to I guess, depending on condition of the 970s - other than cosmetics is there any difference between the two models?
Just cosmetic I think, the rest of my bike is M960 and would just like a complete matching group set. I'll upload a few pics later today. Could you PM a few pics of yours?