I'm guessing about 1,000 type-ins per day and 5-8,000 misdirects. Over the years, lots of companies have used "Server.com" as a generic example of a domain name. Microsoft was the worst.
So it's 6k to 9k uniques per day? Since it's a parked page it should be making a good amount of money from all this traffic.
Let assume 50% conversion rate - 3k to 4.5k clicks at a PPC range of $0.10 to $0.30
That's $300 to $450 per day - about $100k to $160k per year just with PPC ads on the low end - or $900 to $1,350 per day on the high end - about $320k to almost $500k per year on the high end of the PPC range.
Adjust these figures accordingly if the conversion rate is less than 50%
I see why you'd want to seek offers beyond the $500k range. Your target buyer should be a corporation that'd invest in the brand name (much like the Fund.com story) and probably not a big traffic monetizer. This way you can probably get into the 7 figure range.