Goose down cannot be compared with eider duck down. It does not have the air-trapping ability, and is much heavier.

Kat, we paid about $500 for the eider comforters some 40-50 years ago. One for us and one for each of the kids.

The best cheap substitute is a good quality electric blanket, like the ones sold by Hammacher Schlemmer (on line). About $200 for the low voltage type. Also take a look at their temperature regulating sheets. www.hammacher.com; online catalogue.

Pendleton blankets are not bad, but are heavier. Many with great native American designs. About $275 in queen size. Occasionally we but one of their limited designs for a gift.
Some prices include a gift to the American Indian College Fund. www.pendleton-usa.com.