here is the link

(not an affiliate link)

http://smallbusiness.yahoo.com/domains?p=1

all rush in

read the fine print?

1 Waived setup fee Offer is only open to new customers that purchase Domains. Limit one offer per customer, and one use per customer on a single account. The Offer is available only during this web browser session and ends if the user does not complete or interrupts the current order process. No other notice of the expiration of this Offer will be given.

Domains price Offer is open only to new customers that purchase Domains. Limit one offer per customer, and one use per customer on a single account. Offer expires January 11, 2005 at 11:59 PM PST.

Offers may not be combined with any other offers or discounts, separated, redeemed for cash, or transferred. Other terms and conditions apply; see the Yahoo! Small Business Terms of Service when you sign up.

It all seems pretty clear to me...

One offer per customer, only new customers, prices are subject to change if you close the browser window.

What don't you understand?