[EddieP]

I supposed the PC will go down in price with a postmark and writing because of the emphasis with looks and Grades. That being said I prefer the ones with postmarks ( free authentication from the USPS), messages and addresses. I view it as a time capsule that you can fit in the palm of your hand: 1) it shows how people thought during then, 2) it shows how the US population grew. The really old ones had only a name, city and state. Then postal codes were added, followed by zip codes, to finally the ZIP+ 4 numbers. 3) it shows how areas changed. Doing a google search on a home address most often shows the area became a retail/ business zone, and 4) you can get some really cool stamps.