We always send postcards to the grandsons, and they're still young enough to like getting them, but yes, they can be hard to find these days. Some of them look as if they've been lurking in that dark, dusty corner of the shop since the 1960s. We had some beauties to choose from in Llandudno recently though, by local artists, so maybe they're getting popular again?
We post them on day one or two, and they usually do get home before we do, wherever we are. Madeira was the exception - they took 5 or 6 weeks, then all three arrived on the same day!