I bought 2 large amounts of them on ebay that are 100% polyester, good for quilting or machine embroidery. They are 1000m spools, for a little over $1 each. They have a beautiful sheen to them, too :D:D:D
No name brand, but in the 3 years I have been using them, it has been without any problems. I purchased them from two different sources, but I don't remember the sellers.
I guess what I am saying is if you don't mind polyester thread, you can find wonderful deals there :D:D:D