I like what your saying, I don't want to be seen as a rip of merchant but rather someone who charges a fair price and does the job properly. Last night, more fool me but a lady a few streets calls me to say she wanted a plug socket changing as the earth pin on the plug had snapped in it, it only took a few mins, swapped it, did a Zs, charged her a £10 and was in my way, I'll be honest I felt sorry for her single on her own on valentines day with a broken socket.
Sometimes I like to do things cheap like that as it literally took two mins, I know she will ring in the future or hopefully recommend me. I'd if felt guilty if I'd charged her £35 min fee for two mins work and just round the corner.