Expeditious Retreat Press have decided to experiment with the Pay What You Want model with their Advanced Adventures #21: Obsidian Sands of Syncrates module. Joseph Browning has shared a review of the module that was posted at Ten Foot Pole, but says that in general this is the worst selling of the modules. The module itself is a tournament play module for 6-10 characters of level 7-10, while many of the other modules in this series are more traditional non-tournament play. It can be purchased via both DriveThruRPG [AL] and RPGNow [AL]. The module is written for OSRIC, but can be converted easily for other systems.