B&H or Olympus, same offer likely available elsewhere.  The M-1 is being replaced by the $2,000 M-1 Mark II, which has more megapixels and various other upgrades.  But for $1,300 you're getting a lens with a list price of about $1,000 (I got mine used for about $620).  It's one of Olympus's highest-grade lenses, and I'm impressed by it.  

Because of the small sensor and its geometry, the field of view for the lens is equivalent to 24-80 mm with a full-sized dslr camera.  This is an easier camera to carry around than a full-sized one, and is reasonably weatherproof.  So is the lens.  

It's an adequate but not outstanding video camera.  Panasonic (same lens mount) has a better video reputation.  

This camera should work very well with two new super telephotos:  Panasonic's new 100-400 mm zoom apparently works very well with the Olympus.  Olympus's new 300 mm lens is not yet readily available in the US (it can be ordered through Amazon), but it may be the best lens Olympus has ever sold.  

Panasonic has some deals of its own.