I am posting here before I go to Ebay. I have a Sony HD-100 in great shape. I am the original owner and can provide receipt. I purchased at Tweeter w/ a 2-year extended warranty which is just now expired. The unit has the original "footbal player" HU Card which I will disable. All accessories are still in their packaging as I already had all the cables I needed for installation. I have the original box but the manual is a photocopy as one of my kids spilled a drink on the original. The unit has all 3 firmware updates and is a leter generation that has a quieter fan. Any questions please email, do not PM as I do not check the site as regular as email. A recent Ebay search showed these units in this shape with HU card going for well north of $500. I will take $500 shipped to lower 48. Email and we can discuss payment options.