Amazon is having a good deal on this Memory Foam Mousepad + Wrist Rest. These retail at $15, but they’re on sale for just $4.99. Shipping is completely free with prime, (prime free trial).
Link to Mousepad + Wrist Rest Deal
Note: If you’re a college student without Prime you can get a free 6 month trial with this link; If not, you can still get a free month prime