I recently transferred a .us name to Name.com which was $5.99, the cheapest I found from a reputable company.
I didn't need a coupon. I don't think they have increased the price for transfers, just new registrations. Just create a free account with them, log in, them click on transfer & I think the prices are still $5.99 for transfers. EDIT: Just confirmed, logged in myself, yes, it's still $5.99 for: COM, .NET, .ORG, .INFO, .NAME, .BIZ, .US