>>2626626What do you want to use it for?
Have you owned a camera before?
Micro four thirds makes a lot of compromises. It's small, lightweight, usually either magnesium alloy or aluminum, has some of the best weather sealing there is, all on an interchangeable mount. The flip side to this is that the best cameras are very expensive for the performance you get from them. I use an MFT camera because I ride bikes and hike a lot. I wanted something small enough to carry for hours or days without getting worn out (in addition to the other things I have to carry, tripod included) and I wanted an interchangeable mount to give me good versatility whether it's macro, portraits, or river rock pictures I want to take.
You can get all that on an Olympus or Panasonic camera, but you also get bad noise performance if you bring the ISO up at all, mediocre maximum resolution (16mp cap, except for the EM5II which is way more than $500,) and poor third party support.
It's what works for me, and I've decided to stick to it, but I wouldn't recommend it unless you really value something that shaved every ounce off the weight you can get.
The EM5 (mark I) can be bought on KEH for $400 and that's a staple of what popularized MFT cameras. It gives you everything I've listed as advantages, including weather sealing if you pair it with it's 12-50mm macro kit zoom.
