This morning received a e-mail message from Buick, offering a $400 coupon toward a new 2001 Buick, if it will be bought this week. On top of the current $1000 rebate and/or most other available incentives. Cannot be combined with other Internet or direct-mail coupons, though.
For me this is not relevant: already bought a new Regal in October. The second car, a 98 Malibu, with 39k miles, also is fairly new.
Though, it may be useful for the readers who are planing the purchase. FYI, the Internet coupon is available here: