Collect and sell resources, maximize profits & upgrade your Harvester Author Comments: Retro Resources puts you into the action as the Harvester, collecting fast-disappearing resources on a distant planet. Fill up on precious cargo, but keep your eye on the market âEU" some resources are worth more than others! Bring your haul back to base, then upgrade your Harvester to bring in even more. Don't just pick up resources willy-nilly âEU" keep your eye on the market board that shows prices, and go for the big-ticket items first. Remember: the market changes, too, so make sure the upcoming price is high for anything far away from home base!