https://www.theverge.com/2018/10/30/18023686/macbook-pad-mac-apple-trade-in-program-how-to-value-swappa

If you’re looking to trade in your MacBook, iMac, Mac desktop, or an iPad, for one of the new iPad Pro or Mac devices Apple announced today, you stand to get a pretty good return. Apple’s tech has a reputation on the secondhand market for retaining value long after release. This speaks to build quality, but mostly to Apple’s long-lasting software support for its older products. This trend is positive for both buyers, who will end up with a product that will likely continue to work for years, and sellers, who will make much of their original purchase back.

There are plenty of ways of trading in your old Apple products for cash, and no matter which avenue you choose, you’ll first want to make sure that your hardware is in good shape. You can easily net an extra $50 to $100 from a sale if you’ve taken care of your tech, as buyers will pay more for products that look closer to new condition.