It does not matter the condition of your MaxBlaster. We accept them all. The components of value to us (transformer, fan, plates) have lifelong value and we use them to build local rental units and personal machines for our friends and family. It doesn't matter how dirty, heavily-used, or damaged your machine is as long as it's a MaxBlaster. We are glad to help our current customers upgrade to our newest machines thus we offer this program primarily as a way to keep everyone happy. If you have questions about our trade-in program contact us prior to ordering. Thanks!