<p>The NEX-6 has a 2.36MP viewfinder. The a6000 and RX100M3 have the 1.44MP viewfinders. The NEX-6 being an older body can be had for under $300 via Amazon which gives you a return policy.</p>
<p>But, if you want to go smaller, maybe a used Canon G1X or G1XM2? They have an optical viewfinder, fairly decent size sensor (1.85x crop factor), and has all the technical controls one could want. Plus, off-camera flash support. Really, you could do everything with a G1 as you could with a DSLR other than swap lenses.</p>