Amazon offers a $1 Amazon MP3 Credit for free with the purchase of most music CDs. With prices starting at $3.99 plus free shipping for Prime members, it's the best such Amazon credit we've seen with music CDs in recent months. (Non-members can spend $25 or more to qualify for free shipping; otherwise, shipping adds $2.98.) Assuming you use the credit, many CDs are at price lows. Choose from albums such as Incubus' Make Yourself, Alice in Chains' Dirt (pictured), Aerosmith's Get Your Wings, Wu-Tang's Enter the Wu-Tang, and more.