I only started buying daylilies about 10 years ago or so, because I met the owner of a daylily farm and they were only 15 miles away. I started by picking out pretty faces that were fairly cheap ($5 to $10). But in the last couple of years, I want daylilies that bloom very early or very late, fragrant, and tall with a scape that will hold up the blooms. If the daylily farm had not shut down, I would probably be buying fewer daylilies, but spending more ($25-$40) on the ones I would buy because of those traits. I don't see myself paying $50 for a daylily, but that can always change, too!
If I could start over, knowing what I know now, my garden would look so much different. I don't prefer doubles, UFs, blooms down in the foliage, or weak scapes, but some of my daylilies have those traits. And there are a few, like Nell Dean which is a double, that I just love because of the color.