A 52 TT for a 177 seems awfully small, despite, I am sure, the result of a pro fit, though as pointed out, height isn't the real issue, it is inseam and arm length. I am 178cm, and all my bikes are "large" with between 55 to 57 TT, depending on frame geometry.
1. My rig is bang on and I drop absolute hammers on it.
2. This thread is in the classified section and each comment needs approval so let's not start yet another tiresome and unprovable debate about fitting. If you want to do that, start a new thread out of the Classified section.
You do realize that YOU suggested the fit issue, and used your own sizing as a counter point----perhaps ALL references to the size issue should be deleted--makes sense, since, as you pointed out, this is a classified listing--if he wants a 56 bike, let him look for one.
I'm currently asking 100000 yen for it which is a pretty reasonable price for it imho. I also have a lot of other misc bike gear which I could potentially sell or throw in too like a bike bag for the train, tools, etc.