This genuine Inpro Solar 24 Karat Gold Micro Stirling Hot Air Engine comes in the original box with the autographed paperwork from the manufacturer. The engine is in new condition, with the only visible wear being from the candle portion of the unit. It appears that the candle was lit once but there is no visible wear on the main engine portion of the unit (including glass). I am not sure if the wear on the candle was from the manufacturer or testing. Because of the slight candle wear, I am pricing this lower than new from the manufacturer and listing it as used even though the main engine unit is in new condition. The engine will be shipped in the original packaging and wrapped in a poly mailer to ensure safe delivery. Feel free to message me with any questions!