Depends on the tune up...
Spark plugs are a 100,000 mile item
Usually the air filter can be changed by yourself but the fuel fliter I would recommend a pro preferably the dealer as I've had a few of the speedy lubes break the fuel clips that hold the fuel lines on and can cause unsafe conditions.
The fuel injector flush is a question mark.
If you use a high quality gas with detergents then you won't see them get clogged up as using the lowest price gas you can find.
However some places clean the intake at the same time they clean the fuel injectors and is worth it to help with idle quality as well as junk that builds occasionally on the valves
Depending upon what is being changed, It can be a fair price or a hair high one at a dealer. However I find the dealer and some of the chain stores quote the same labor rate for services..go figure