Beemer
It seems price "mistakes" such as those described in the thread were a (un)popular topic of conversation a zillion years before the Net. I think Moses is still exchanging correspondence with the attorney for the outlet who sold him his sandals, i.e., "Guaranteed to get you to The Promised Land!" Socal, my little Techno - Peanut, I do not know the answer to this question off hand. Interesting, however: Vendor relying on Disclaimer (potentially, as I do not know which company was the impetus for the thread, so we'll assume there was a Disclaimer on Date of Purchase / Confirmation); vs. Buyer relying upon posted price and confirmation.
Both have arguments: I should think (if) a "disclaimer clothed vendor" would win the day as presumably the Buyer will have the sense to read such a notice to be an informed party to the transaction. (Admittedly, I think I have read 2 during my career as an Internet shopper in the paragraph dealing with returning of merchandise!)
On the other hand, the Buyer really should win the day because a business dealing over the medium or venue of the Internet has every reason to expect a posted price to be honored by the vendor. Put simply: posted price = posted price. Additionally, those in the business of vending on the Net understand or appreciate that Disclaimers will likely rarely be seen by anyone but the attorney for an aggrieved party (especially those that are composed in teeny weenie print and buried on a back page). A vendor should not be permitted to hide behind a blanket disclaimer which simply attempts to shield it from all liability regardless of the consequences visited upon a buyer. A vendor should monitor closely that which is advertised under its name. Additionally, a business is certainly in a better position (1) to make certain the posted prices are accurate; and, (2) a vendor is likely better able to absorb the cost of the error.
The point made in an earlier response to this query to the effect that a $1,000 item with a posted price of $10 gives a bit of leeway to the vendor (vis-a-vis a mitigating factor) makes great sense. One would think the legislative law-drafters would throw a bit of common sense into any final bill (relevant to this topic) before it is signed off on ...
It might be prudent to consider the damages to each party to the transaction when evaluating each party's argument in determining whether the vendor's disclaimer should or should not win the day.
Regarding the buyer: The buyer will have been inconvenienced, as now (if he chooses) the item must be reordered, requiring additional time and dashed hopes. Presumably the buyer misses out on the "benefit of the bargain," as the item in question likely will cost more elsewhere (he likely will not purchase the "purchased" item [again] from the same vendor who ... I'm searching for the legal term: "screwed'em." (Tough term to remember -> Latin derivation, I think). {As an aside, Latin was actually a required pre-requisite to law school admission not that long ago! Now it's just money up front ...} And the REAL price is likely higher than that which the aggrieved buyer (originally) bought it for.
Regarding the Vendor: "Who cares???" one might ask, mustn't one? Well, he and other vendors do, of course! Suppose the vendor had received 20, or maybe 2000 responses to the posted price? That adds up to a lot of "monetary pain" {See: Legal term, supra}. So the vendor's damages really are strictly monetary (which includes the cost of a few cartons of Tums, and resulting rise in the unemployment stats or a Web agency losing an account. Though it may also include the loss of future revenues, which is no fault of the buyer. And any loss may be subjugated to a 3rd party, e.g., ad agency.
So: the answer is? I have no idea, though I'd rather be in the shoes of the buyer's barrister. I do not practice that kind of law. It seems to me for the reasons stated above ... no, I still don't know.
If I find out, I shall be happy to post that good old "Black Letter Law" right here at "Station TechIMO."
Sincerely,
Yours in the law,
Brangwen