popo, the seller posted that his wife had told him it that either his motorcycle or the camera had to go, and he decided to keep the motorcycle. Maybe it was a clever sales pitch, or maybe it was true. The camera arrived looking like-new. I did not try to hide it from my wife; she is a keen photographer, and would notice.
The only EOS-M lens available locally is the 18-55mm kit lens, and I am not so sure I really have much use for it, having more interest in "pancake" lenses to keep things compact. I clicked-through to Amazon via the Camera Labs link, and ordered the Canon adapter, and a spare battery. If this camera behaves well with my 40mm STM, I may then order the 22mm EF-M lens, or 24mm EF-S STM.
The Canon EF-M 11-22mm lens has been well-received outside the USA, but has yet to become a Canon USA product, so I may eventually try one, buying pre-owned, or through the grey market. Another interesting lens, that might pair well with the M3, using the adapter, is the EF 8-15mm Fisheye. Not being STM, AF will not be fast, but I seem to recall reading that the 8-15 FE has a very short focus "throw" distance, so AF may well be reasonably achieved.
I could, also, try stacking adapters, using my long-neglected Novoflex EOS/NIK adapter, on the Canon adapter, to shoot with Nikkors, focusing manually.
Canon 7D2/7D/5D/40D/1D2N/M3; Nikon F6/D700/FM3A/1Dx/Coolpix A; Canon 40mm 2.8 STM, 135L, 50L, 35L, 50mm 1.8 I, 100mm 2.8L Macro, 10-22mm EF-S, 400mm 5.6L, 16-35mm 2.8L II; Nikkor 50mm 1.2 AI-S, 50mm 1.4G, 50mm 1.8D, 16mm 2.8D Fisheye, 180mm 2.8D, 100-300mm 5.6 AI-S, 45mm 2.8 AI-P, 14-24mm 2.8G, 24-70mm 2.8G, Micro-Nikkor 60/2.8G; Voigtlander 90mm f/3.5 SL II, Zeiss ZF.2 2/135 APO