In .com, these would probably be pretty great names. But even then, yoga instructors are not flush with cash, so are they really going to be spending $5-10K on a name?
In .net, the value is like 5% of the .com value. So you can probably put a $200-500 BIN on these and there's a decent possibility they'd sell.
But I'm not a .net buyer or seller by any means so really, I have no idea.