"Anyone who was a qualified buyer"
What criteria did you use to determine a "qualified" buyer?
As someone who frequently deals in transactions over the web for large dollar amounts it is not always clear who is qualified and who isn't. Especially if you aren't doing a high volume of transactions so you don't have a pattern established. One recent transaction we handled for someone started off with an insulting offer of $1000 (from a gmail type account in China (qq.com) and ended up at $38,000 USD)