I bought one a few years ago in 300 H&H just because you don't see nice original specimens anymore and I'd had good luck with other chamberings in 721's and 722's.

If it is unaltered and in good shape and a 300 H&H is in your plans, then it is a good deal. Mine was a 99% specimen except for the original Whiteline pad which was so hard that it was no better than a metal buttplate!!! IIRC, I sold it to a guy along with a set of Lee Loader dies for $625 or $650 and he was tickled to get it!!! I love M70's but it's getting hard to find decent 300 H&H's for twice that anymore.