Could be a scam... hard to say for sure. If I had to /guess/ I'd say yes. With bids up to 1.7 million dollars and a cancelled bid of $5,000,000 I'd say this is fantasyland. The big time sales takes weeks or months to negotiate. It is unlikely that someone could just throw a domain on eBay and generate interest resulting in buyer actions of this nature in such a short period of time.