hellomusic.com: $20 off $150+
Don't forget to cash in on their twitter promo! Use the coupon TWEET20 and get $20 Off of orders over $150.
You can find some truly amazing deals there IF you know your prices. If you find something you like it pays to act fast as sometimes they go out-of-stock or change the price quite rapidly. Personally, I've had nothing but great experiences with them. Plus they have a very generous return policy if there is a problem or you don't like what you ordered. YMMV.......of course.....
Short-Scale Six-String Bass Club
The Acoustic (Amp) Club