If you need some repairs carrying out to your vehicle then you may want to price up the cost of obtaining the parts yourself.
Car parts can be expensive especially if you get them from the main dealer when often non genuine parts will do the job just as well. You can chose to buy car parts second hand but there is a he element of risk if buying something that you cannot see working. You also need to know exactly what you are looking for as many garages will not advise you on parts when buying from a third party.
Once you have a few quotes go back to the garage carrying out the repairs and ask them if they would be willing for you to buy the part yourself. Lots of smaller independent garages will do this but will not put any kind of warranty on the part they have fitted for you.