I can confirm that yes, I did sell creditcards.ca and of course there was a non-disclosure clause. One or two people may know the approx price, but only because I had confided in them during my negotiations, prior to any discussion of a non-disclosure. In the end, the combination of timing and price was too good to pass up. It was still painful, kinda like I imagine when your kids grow up and leave home. Luckily I've still got other premium "kids" left at home to keep me busy.
Note however, that the purchaser was NOT bankrate.com, although they did call me about it last year too. The purchaser was someone who had been calling me for over 2 years about purchasing it. The fact that Bankrate.com didn't purchase creditcards.com until last year indicates that the buyer probably had a relationship with creditcards.com rather than the now parent company of bankrate.com. In any case, I certainly was aware that he could be bird dogging for someone like bankrate/creditcards.com, although I couldn't prove it. But the fact of the matter was that I was willing to sell it for a set price at that time, and it didn't really matter who it was. It would be interesting to know how the flip to bankrate happened, and how much the middle man made from it. FYI, the primary reason Zak was used was that he could safely hold the domain until the purchaser later establishes their canadian presence requirements.
Rob