Coulax via Amazon has COULAX Wireless Charger 2 Coils Qi Fast Wireless Charging Pad Stand for $12.99 w/promotion of an additional 27% off when you add a second, third, fourth etc
Although the promo reflects it's applicable to only 1, I added 4 to my cart and the $14.03 promo was applied to all 4. This effectively makes this deal slicker than the previous post of this stand. I purchased two of these ~45 days ago and I can attest they work great, I'm very happy with them. Note they do not come with AC adapter.
Shipping is free with Prime or on qualifying orders of $25+. Works with Samsung Galaxy Note 8, S8, S8 Plus, S7, S6 Edge, and for iPhone 8, 8 Plus, and iPhone X.
Shipping & handling:$0.00
Promotion applied: -$7.01 (27% off purchase of 2 stands)
Total before tax: $18.97
Estimated tax to be collected: $0.00
Order Total: $18.97