You're telling me not one person had the foresight to increase their max bid to $1500, so as to decrease the likelihood of getting outbid.
Hmmm. According to you they should be guaranteed to double their money, and yet that didn't happen. Seems like a no brainer.
Speaking of no brainer, it wasn't me that kooked you, and I know how bidding works. What I don't know is where you got your guess at a value. Just because someone is selling it on ebay for $3500, doesn't mean it will sell for that, or clearly is even worth half.