Mac2Mall via eBay offers the refurbished 2.3-lb. Apple MacBook Air Intel Broadwell Core i5 1.6GHz 11.6" Laptop for $379 with free shipping. That's the lowest price we could find for a refurb today by $123 (excluding other eBay vendors), although we saw it for $30 less in October. This early-2015 model features: Intel Core i5-5250U 1.6GHz Broadwell dual-core processor 11.6" 1366x768 (720p) LED-backlit LCD 4GB RAM & 128GB flash storage USB 3.0 & Thunderbolt 2 Mac OS X 10.10 (Yosemite) Note: A 30-day warranty applies, but it's unclear who backs it.
You don't need to hire a contractor or do extensive renovations to add value to your home.