Compare scope before the total
Plumbing prices depend on access, diagnosis, labour, materials, urgency, system condition and reinstatement. A useful quote should state what is included and what is excluded.
Separate investigation from repair where necessary
Hidden leaks, recurring drain problems and concealed pipe failures may need investigation before a final repair scope is known. Where that is the case, the quote should make the uncertainty clear.
Avoid false precision
This site does not publish invented national price ranges. Real prices should only be added when the business has current, supportable pricing data and the assumptions are stated.