You can usually find replacement "sticks" for the big brands, and even some of the smaller brands online (eg: eBay). A number of brands also have good spare parts available (eg: heater cores with thermocouples in them so you can just replace the broken part) if you're up to repairing it yourself.
If you do go shopping for a complete soldering station, make sure to go check out the spare parts available for it before you buy. It's worth buying a somewhat decent iron that a large variety of spares are available for, as then you should be easily able to repair it yourself should something go wrong, as the spares should be substantially cheaper than buying a whole new iron.
If you do go shopping for a complete soldering station, make sure to go check out the spare parts available for it before you buy. It's worth buying a somewhat decent iron that a large variety of spares are available for, as then you should be easily able to repair it yourself should something go wrong, as the spares should be substantially cheaper than buying a whole new iron.