YSK It is highly unethical for someone to appraise an item for you and then make an offer to buy it. They are likely attempting to swindle you out of a lot of money. If that happens, be sure to go get an appraisal from someone else
from /r/YouShouldKnow
YSK 如果有人为你评估一件物品，然后出价购买，这是非常不道德的。他们很可能是想骗取您的大量金钱。如果发生这种情况，一定要去找别人估价。