With refurb and online purchase, once you're out of 30 day return window, shipping's on you to denons repair facility in New Jersey.
figure on 50.00. That said, I recommend getting the best deal possible from your local retailer ( preferably one that's factory authorized for repairs).
Also, check out every possible functionality when you get your refurb.. I've had two now that had problems outside the return window that, had I looked closer, I might have saved shipping charges.
Cheers, Mac