Thanks soooo much everyone for your input. Good thing I'm not in Pittsburg! I don't know if it's recoverable. I took some pictures....
The one on the left is my 'haul' from the yarn sale: 2 hanks of gorgeous expensive stuff and 2 skeins of cheaper stuff to mix in and hopefully make it go further. One of the hanks in the 'haul' picture is still packaged up, so you can see unmessed (sorry about the picture....you might need a magnifying glass ) The tangled mess is in there, with the small part of it I managed to roll into a ball (on the right).
Today I bought a small gold necklace at TJMaxx. It's a 5-tiered necklace of very fine gold chains. They were all tangled up. I can't believe I let myself get into this again, but it was reduced for clearance and I love wasting valuable time. I spent about 1 1/2 hours trying to untangle the fine chains and make the necklace drape right. I took a break. Later, I pegged down one side of the necklace where I'd made the chains lie in the right order. Then, with the pegs holding it down, I twisted and unraveled the other end and...voila! I now have an untangled necklace. Oh, I wish it was so easy for the yarn!