For the BUY.COM $30 coupon go to
Couponcraze
There are other sites where you can get the coupon but I like couponcraze cuz all you have to do is click on the coupon and it will open a new window at buy.com and enter the coupon code for you.
I just did this last night to get a $30 discount off a monitor at buy.com. Woked great.
As for having to be a new customer some folks on here have suggested you can creat a new customer account by using a diff. credit card than the one you already have on file at buy.com
I just looked at couponcraze and there are several good coupons available for existing buy.com customers as well as new customers.