Hello audiophile. I have Nad M51 DAC for sale. I want to upgrade my system. The shipping cost and paypal is free when you pay my asking price otherwise you pay shipping and 3%paypal. I'm the original owner, very careful when using. Ive been using it for 1 and half year now. No Pet, no kid (not now) in my house. Really good condition, but 1 small scratch (look on picture). Sorry i don't have the original box, but will be double box and insurance to shipping. Thank you for reading.