The car looks great, however unless you can get someone who really knows their stuff to look over the car, or a trusted mechanic I'd be cautious.
The water pump change does hint at it having done more kms than stated.
When my 100,000km service was done last year at 101,000kms, the water pump was in excellent visual condition and my mechanic commented how you'd most likely get another 100,000kms out of it, but we changed it anyway.
So I would say it has done at least 100,000kms, perhaps more. I'd work on the basis of the car doing at least 100,000 + what ever is on the speedo now. The general condition of the interior points to a car that was well cared for, but well used at the same time.
Is there any stickers/writing around the timing belt cover to hint at replacement?