TechRabbit via eBay offers the refurbished Apple MacBook Air Intel Haswell Core i5 1.3GHz 13.3" LED-Backlit Laptop for $599.99. Apply coupon code "P20FINDYOURTECH" and check out via PayPal to drop that to $549.99. With free shipping, that's $30 below our January mention and the lowest price we've seen. (It's the best deal now for such a refurb by $125 and $329 less than buying new.) This mid-2013 laptop features an Intel Haswell Core i5-4250U 1.3GHz dual-core processor, 13.3" 1440x900 LED-backlit LCD, 4GB RAM, 128GB SSD, 802.11ac wireless, Bluetooth 4.0, Facetime camera, Thunderbolt, and Mac OS X 10.8 Mountain Lion. Deal ends May 18.

Note: This coupon can be used once per PayPal account within a single transaction. No warranty info is provided.