Extremely over priced leads.

I am a heating engineer and stop doing gas 2 years back. I have now passed my gas safe again and looking to win jobs from Rated people as i previously did. However I am concerned regarding the current pricing uses. I am find landlords certificate for boiler, rated people charge between £11-17 plus vat. Some of jobs posted like annual service and landlords only fetch on average between 40 ti £60 which is making bidding at times not fee sable and overpriced. So customer has to be charged an inflated rate sometime just to cover costs. This cost as more than doubled in last couplets of yea r??