alt Hacker NewsYou can get a Canon 5D II or a Canon 6D for that. Older cameras for sure, but full frame with excellent sensors. And there are a ton of inexpensive used EF lenses available.
Compared to moderns systems the main difference is the autofocus and video capabilities. Modern mirrorless have cosmically better tracking, eye detect etc.
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Full frame sensor = full frame lenses = heavy and expensive. You need something light that you want to carry with you. Otherwise what's the point of having the best medium format camera + lens that you have at home, collecting dust.
That means a camera APS-C or micro four thirds sensor might suit better to someone who is new to photography.
To add: Hit https://en.wikipedia.org/wiki/Canon_EOS_5D_Mark_II and scroll down to the very end, then click "show" to expand the "Canon EOS digital SLR timeline". This is an incredible collection of information that I can't figure out how to link directly.
Also speaking of older models I think it is important to repeat that the pixel count is not what define the quality of the image but mereley only how cropable the end result will be and it is only really useful if the higher pixel count isn't made of garbage. Accutance of the end result is in most cases much more important.
For instance, human eyes can't perceive the difference between a 12MP and a 50MP image printed in a poster format from a typical 1.5-2meters viewing distance and 8MP is usually good enough for most large prints.
So I would advise choosing a second hand model taking shutter count, general state, lenses quality, autofocus speed and image stabilisation efficiency as more prioritary parameters than sensor pixel count.