Brass Pipe Fittings

Just over two weeks ago I saw a neighbour walking out with a small plastic bag placing it neatly beside the trash dump across the street. I thought if not in, it may be interesting.

Here are the contents. Listed the next day, sold this morning at €10. Perhaps too cheap, because depending the model such joints go between €6 and over 60 new, but it's fine. I don't know anything about the product and wanted to be sure to get at least some money out. I hoped to make some DIY enthusiast happy with the lot, but to my surprise a professional fitter, though probably self-employed,  came for it.