For me, the most surprising finds at my neighborhood thrift store are doilies. I know that they are long out of style, but the work that goes into one? They should cost hundreds of dollars. I know this, because I once bought a crochet book, a hook, and some thread and set off to learn to crochet a doily while my family played along the beaches of Lake Michigan. It is tediously hard work. If I remember correctly, I got something about the size of a silver dollar except it would not lay flat.
this piece is not crochet, and it doesn't look like tatting either.
But it's beautiful and flawless and works perfectly for me!