From your initial photo's of the bike, I can see that it is possible to raise the seat much higher than it is in the photo. (Look for a limit mark in the seat stem - don't go higher than that mark) It wound also be easy to change the quill stem for a longer one to give you more room on the bike. I would say that the present owner, if he actually rode the bike, is 3 to 5cm shorter than you. The bike is set up for a shorter person. The previous owner was trying to fit onto a bike frame that was actually too big for him.

If you have a look at my red bike - it is a 58cm frame (from the centre of the crank axle to the centre of where the top tube would be if it crossed the seat tube - measured along the seat tube). I'm 185cm high and I have the frame set up to it's limit in seat height. I would estimate that my frame would suit riders that fit into the 180cm to 186cm height range. I am of an average build - my legs are not long or short in proportion to the rest of my body.

If you are of a similar height and you have measured the frame in a similar way to me I would say that the frame would suit you.

I must say that I like riding my bike quickly and efficiently. I can't put both toes on the ground and still sit on the saddle when the bike has stopped.

By the way, the Columbus MAX frame material is extremely good.