i got a 100,000km service kit and that sticker came with the timing belt (genuine nissan belt)
so that means its had the belt changed, i'd just be more concerned about the mismatch between dash and de-rego papers
oh, and its a cold pack one too (has 1 reverse light and 1 rear fog light)
i'd walk away, a lot of guys get pretty bad rust issues down the road
put it on a hoist and have a look