In their "All things considered" segment, NPR interviewed Bill Sweetman from Yummy Names and Kathy Nielsen from Sedo.
They also interviewed the band.
Taken from the article:
Selling To The Highest Bidder
Chatwood won't say much about his politics, except that he's very happy with his Canadian socialized medical care.
He says his first thought was to sell the site to Jon Stewart or Stephen Colbert, but when that didn't work out, the band decided to simply sell to the highest bidder. They hired domain-name broker Sedo, which sold Sex.com for $13 million in 2010, to help them out. Sedo spokeswoman Kathy Nielsen says she doesn't think TeaParty.com will fetch as much as Sex.com did, but — between its traffic numbers and its search value — it could still be worth more than a million dollars.
"Say it's a Tea Party group that needs it for fundraising," Nielsen says. "They can make a business case out of it."
Others are predicting a more modest price, in the low- to mid-six figures.
Here is a link to the audio interview (length 4:36)