In this era of high-end phones at high-end prices, Swappa works to match buyers and sellers who appreciate getting a great deal on gently used equipment. I have bought and sold devices on Swappa, and have never had a problem in any way. The community is well-meaning and the sellers are honest and honorable. Buying using Swappa should be a definite consideration for anyone wanting to get a high-quality phone for prices that are fair and accurate.
Swappa will continue to be great as long as sellers and buyers respect the norms of the marketplace. I am seeing comments that make me wonder how long it can persist in its current form before descending into the chaos that is a famous internet-based classified ad site. I am hopeful that Swappa remains a place for good sellers and buyers, and not scams. Here's hoping. For now, I'm still quite pleased.