Ask your friends and family Tomcorigan, one of them at least will have used the services of a plumber in the last 18mnths, plumbers get a lot of bad press because of these "builders from hell" type programe.
My old college tutor Eric used to be one of the "experts" the programes called on to inspect the work that these rouge traders had done, hes stopped doing it now because the way the programes were rigged.
They basicly get the names of 10 plumbers who have had complaints made about them to trading standards... so your off to a bad start already, then get them round to do a job, a few wont turn up, some will turn up and do a reasonable job for a reasonable price, then 2 will turn up and do a bad job for silly money.
The truth is that if you were to phone up 10 plumbers from the little one line ads in the yellow pages, J Smith and sons etc, 10 of them would turn up and do a good job for a reasonable price.
When ever I go into a new custards house they are usauly on thier gard and suspicous of me becuse theyve seen these programes, it makes it very hard for me to gain thier trust, some of them will question everything that I say and somtimes I really dont want to tell them that thier boiler etc is beyond economic repair because it sounds like Iam making it up even though its the truth.
Sorry for the long rant, the crux of my post is, the chances of you having a bad job done for an extortianate price are alot less than you may think.