The Rock Pi 4 Model C is available to order from another retailer for the princely sum of US$59.00. Previously, AllNetChina had been the only retailer to offer the single-board computer at that price, but Seeedstudio has now got in on the act.
https://www.notebookcheck.net/The-Rock-Pi-4-Model-C-is-now-orderable-from-another-retailer.484338.0.html