Is a customer entitled to a substitution?

This weekend, a laptop went on sale as a one-time event for $278. This laptop had 2 GB of memory and a 320 GB hard drive. A customer came in wanting to purchase the $278 laptop but we were sold out of it. The customer wanted me to substitute a similar laptop, which had higher memory of 4 GB and a larger hard drive of 500 GB and a faster processor. This laptop had a price of $398. Was the customer entitled to a price override for the "better" laptop for $278 because we were sold out of the actual laptop in the ad? I explained to the customer that I cannot drop a price of a laptop that is NOT part of the sales ad and then the manager said he couldn't override the price either. Is the customer entitled to anything at all concerning the laptop prices?