How do you work out the first guy was going to rip you off the fault was the gas valve and at £180 quid he was charging you less than retail for the valve.
Not everyone knows that these valves have removable solenoids and the part number is not readily avialable so he is not at fault there
And 60 quid to change one of those valves is quite reasonacle as the pilot supply has to be changed with it.
So the answer is in your reply, the first guy didnt know that these valves have removable solenoids and the third guy did, so i went with the third guy.
Lets put it another way, lets imagine that the first guy and the third guy both said its the solenoids that need replacing but the first guy is charging 240.00 and the third guy is charging 128.00 for the compleate job and they are both gas safe registered(which they where) who do you think i am going to go with?