This is bait and switch.
He purchased the building, did up a unit, and then uses that one to show off the other units in the building, then puts you in an old and neglected unit, nothing like the listing.
The big ones were: The floor needs replacing, and the shower door was sticky. But you can tell it's different because
1) The layout is completely different
2) The fridge is old and yellow
3) The microwave was not the one shown
4) The toilet was not the one shown
I'm sure there's more but I never looked in detail while I was there because I was busy doing things, so this is just the stuff I remember.