Suggestions for a Plumber rate card

[Nick M.]

Hey guys,

Was charged $375 to replace a hot water expansion tank and $155 to cut out and press or crimp in a new 4 inch section of copper piping (had a pin size hole that developed and leaked water).  This in Philadelphia.

Moving forward I'd like to have a standard list of common plumbing issues bid on by plumbers.  The plumber with the best overall prices would be my go-to plumber.  Any thoughts on:

1) Whether I paid fairly for above
2) What are common plumbing issues that should be priced out?

Thanks!

Thanks,
Nabeel