We had a 78/79 S.D. Curlee donated to our charity yardsale and not sure the best place to sell it! Any ideas?
eBay is usually a solid option. Make sure to get someone who knows instruments to photograph and list it properly.
Did you post the S.D. Curlee anywhere?
You might want to try Gruhn Guitars. They are a leader in truly vintage guitars, though I do not know if an S.D. Curlee guitar qualifies. They were never very popular - too plain looking and nothing that set them apart from other makers, save for the method in which they bolted their necks onto the guitar body.