Clark chuckles when he hears people getting upset about the cost of a stamp going up by a penny. One person he spoke to was in a tizzy about trying to buy Forever stamps before the price went up. But it's only a 2.5% percent increase, so it wasn't exactly a good idea to tie up money buying Forever stamps in bulk.

The postal service may be less relevant in the e-mail age, but a stamp still remains a deal. With great reliability, they'll take a letter from one place in the United States to another for little more than 40 cents in just a couple of days.

On the other hand, the USPS is doing a lousy job competing with UPS and FedEx when it comes to reliable tracking. But regular mail remains a deal. Clark saw a USPS chart that showed the price of a stamp is actually cheaper now -- adjusted for inflation -- than it was in 1913, 1935 or 1965. So even though the price of a stamp just went up, he still salutes it as a Clark Smart buy.