If the error is significant enough no court will enforce the agreement. The Doyle hypothetical is an example. The # is so egregiously low that the buyer shouldn't really expect to get the deal if the seller figures it out. The buyer might even face a lawsuit to rescind the deal on the basis of mistake. That wasn't the case here: $2k instead of $3.2K is not that degree of mistake. $2K instead of $32K probably is.
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