Camera cleaning and check will cost you around $90, which includes CCD and external cleaning. In sensor cleaning itself will cost you around $40.
If you have the knowledge on how to do simple cleaning, you will just spend an estimated $16 in purchasing a set of cleaning kits that are available online. However you should also have an illuminated magnifier to properly inspect your sensor. Rubbing debris across your sensor is a sure fire way to damage your sensor and may result in expensive repair bills.
The cost of cleaning your device varies on which service you will choose. Some independent camera experts out there offer a lower price than the manufacturer’s own service centers.