YSK that you shouldn't offer over asking price on a house. Offer asking and have your realtor include an escalation clause, this way if you're the only offer you may end up saving tens of thousands of dollars.
from /r/YouShouldKnow
YSK認爲，你不應該對房子提出超過要價的報價。如果你是唯一的出價，你可以讓你的房地產經紀人包括一個升級條款，這樣的話，如果你是唯一的出價，你可能最終會節省數萬美元。