Yep it worked. So, looks like a pretty heavily used Brown Marble but a good cleaning can do wonders. Make sure the rods aren't bent (~$40/each) and that there is no chipped or loose/bulging laminate around the interior of the play field. I would consider laminate issues to be a deal killer, especially bulging laminate or squishy spots (water damage).
Now the bad news. Those aren't the correct bearings. Replacing all 16 bearings with the correct ones (which you would definitely want to do) will cost ~$100. But what I fear is that the owner may have damaged the holes when he put these wrong bearings in. If they slipped in easily, then it should be no problem taking them out and replacing them with the correct bearings. If he had to pound them in and damaged the holes in the process, I would consider that a deal killer.
Given the issues, I would start at $300-350 and start subtracting $ depending on what parts you would need to get this thing up to snuff. Right off the bat is -$100 for bearings.