I would argue it takes common sense in this case

来源: 2015-01-25 18:09:12 [旧帖] [给我悄悄话] 本文已被阅读:

When you see the house sells less than the building cost, you know you are probably "OK" to get in.

While in the case of buying in Palo Alto, it takes VISION to foresee that the price would increase so quickly.