How common are Dell $750 off coupons?

[321Mike]

I was planning to buy a Dell 9300 in a couple weeks, but I see there is a coupon for $750 off Inspirons over $1999 that is about to expire. That coupon is perfect for me, but the timing is just a little off. If that $750 off coupon is a rarity I'll pull the trigger today. If I pass on this deal, what are the chances I'll be able to get a comparable deal in December? If it means having to wait until January or beyond for a good deal I'd prefer to buy now.