From their FAQ >Shypmate does not process requested items until it has been paid for. Once payment is confirmed, Shypmate will purchase item(s) within 24 hours

From their FAQ >Shypmate does not process requested items until it has been paid for. Once payment is confirmed, Shypmate will purchase item(s) within 24 hours and have it mailed directly to a Shypmate Traveler. So it looks like the products come from established online retailers and not from "my buddy is going to drop off a package to your house, don't open it, just deliver it".