Can I be billed for improperly priced items on the internet?

A major on line (and brick and mortar) retailer occasionaly runs “2 DVDs for $X” specials, where X is a very reasonable number that varies from week to week. According to the fine print of their ads, which I never read until now, the offer is valid only for pairs of movies. Despite this, any number of movies greater than 2 are charged at the X/2 rate when purchased on-line. In the past I have in fact bought 3 movies at a time, and paid the sale rate, to which I was apparently not entitled. If made aware of this, can the seller insist I pay the difference or return the merchandise?

WAG, but if in a regular store and the salesperson makes a mistake that you don’t notice, I doubt they can charge you for their mistake later.

Also, grocery stores might have a sale of 2 for $5 on something, but give you one item for $2.50 when it gets rung up.

I wouldn’t worry about it, personally. All IMO though.

Almost certainly not. If the seller has already taken your cash/ cashed your check/ billed your credit card, etc. and delivered the merchandise, then it has agreed to whatever price you’ve offered.

There are some narrow exceptions to this, such as when a person tries to pay off a debt by sending in a check for a smaller amount labeled “paid in full,” knowing that the company cashes checks automatically without a real human ever looking at them.

In similar situations, the company might have some sort of mistake defense. This happened in a case where an employee sold a $1,600 baseball card for $16.00. But here, where you are completely blameless, and the real terms and hidden in the fine print, its the company’s own fault for accepting the sale conditions you thought it was offering.

If the transaction is completed (i.e., you have paid for the goods and the seller has delivered them to you), then without fraud on your part, I don’t see how the seller can revisit the transaction.

Did you get an invoice or bill of salereceipt by email or with the merchandise and keep a copy?
In some states 2/$5 is the same as 2 x $2.50 = $5. i.e. $2.50 each!

That’s what I figured. This is actually a run-up to the current situation. I bought 3 movies recently, but due to an error on their part was billed the full price for them. I pointed this out, and have had refunded the price difference for two of the movies but not the 3rd, which is correct according to their stated policy, but not how the system really works (and it still sells odd numbers of movies all at the lower price, as of this afternoon.) I’m unsure whether to instist on getting the refund for the 3rd movie, for which I would have paid the (improper) sale price had their software worked the way it normally does. I hate feeling like I was cheated, but if I point out that their web site sells things for an unadvertised low price, they may fix it, which will cost me more in the future should I wish to avail myself of odd numbers of movies later.