A regular service provides peace of mind that your vehicle is safe and roadworthy.  It also helps to identify minor issues before they turn into bigger (and more expensive) problems.  Regular oil changes and filter replacements also ensures your car is running efficiently, which will save you money on your fuel bill.

Not only will you save money in the long run, but regular servicing and proof of a full service history is a positive selling point which will get you a better price for your car.