Siemens breakers and other brands are made with simple designs which make them perfect for reutilization. Unlike some products, there is a big demand for old, outdated or worn-out Siemens circuit breakers. Surplus buyback programs, store credit plans and other incentives are offered for breakers; depending on the make and model of your Siemens circuit breakers you should consider saving your old breakers until you have a small collection to sell back.
This is especially true if you have a system which uses obsolete breakers. These circuit breakers can be re-worked and put back on the market just the same same as their modern counterparts. The one thing you should not do with your old breakers, whether they are Siemens QT circuit breakers, Pushmatic breakers or any other model, is throw them in the trash or recycling bin. Until you know for sure what the buyback value of your old breakers might be, it's best to hang on to them until your collection has grown to the point where you can earn a good amount of store credit.