Who writes letters these days?

So it's been an interesting couple of days. I walked into the shop today, after not being there for 3 weeks, and I found this letter here waiting for me. Who writes letters these days?!! It's pretty cool actually. I've never had someone mail a letter commending me on my salesmanship. I was helping this girl out the week before I left. We must have gone thru 3 bikes. She didn't quite want the girlie pastel pink or pastel blue bikes.

Too bad, I'm thinking about sending a reply - after all she seemed cool and was kinda cute - but seems like too much a business thing, and it's a bit shady for me to cross that line.