I ordered a phone for $700 plus, conditioned on prompt shipment. The seller shipped on time -- by the slowest method, which is predicted by UPS to take six days, which means that it might arrive sometime late next week if I am lucky. Swappa said, "too bad, UPS ground is acceptable." Stick with Amazon fulfillment or Prime -- at least you'll get your item in some reasonable time. I buy horse equipment online and, even on Facebook Marketplace, the shipping time is less than 1/2 of Swappa. Stay away unless you have no need for what you are buying.
Donna,
Shipping on Swappa is built into the cost. Our shipping policy is here: https://swappa.com/faq/answer/safe_standard_shipping_policies
Comparing free shipping on Swappa to a paid yearly subscription model like Amazon prime is simply not a fair comparison.
Many of our sellers offer priority tracking and/or express shipping options if needed.