This is the "silent killer" of espresso machines. Ask the seller if they used filtered or softened water.
Look for cleanliness. A blackened or oily group head indicates the machine wasn't backwashed regularly. 3. Part Availability buy used espresso machine
Look under the machine and around the steam wand for any signs of dripping. This is the "silent killer" of espresso machines
A budget that buys a basic new machine can often secure a "dual boiler" or "heat exchanger" used model. buy used espresso machine