Depends, where r u? Regardless, 2- or 3- year is the best, usually referred
to as "better than new." But you are asking about "不怎么费事". In Texas,
many houses got termites or structural problems in 10 years, so you don't
want to consider anything older. But in New England, oh, man, 50-year-old is
still young, structurally speaking. Just need a bit of renovation.