I would've checked that his conservatory roof wasn't a big massive thing and then stated a £60 minimum charge, to hear how desperate he was.
Houses sell for hundreds of thousands of pounds, and he may consider £60 a small price to pay for a window cleaner who'll come out at short notice, but the potential return of some nice pictures for the estate agents window and a possible better opportunity at selling his house.
I don't automatically snub one-offs; I've got a small three-story town house booked to do; it's a rented property and part of the tenancy agreement for them prior to moving out is to have the windows cleaned.
I've charged £40 and they agreed; and it'll take about 20 minutes, and it's within a clump of houses I already clean.
i agree with all that tosh and would of liked to help him out, had he mentioned last week that he needed it done by today. it was when he asked to borrow "an angled brush" it got wierd and even if i had driven about 5 miles out of my way and gave him a quote he might not of wanted to pay..basically it was too much hassle today.
That's why you enquire over the phone as to how big his conservatory roof is - approx (just ask is it a small, medium, or big un') and then say a high number like £60 minimum charge - over the phone - to save a wasted 10 mile round trip.
It sounds like he was that desperate, he would've done it himself.
Sometimes, another tactic I use is to take the time to be totally honest:
"Look, I'll be honest with you, it's like this, I've loads of work on and if I came out to quote, you may say no - and that will be a wasted journey for me - and it's also a one off clean, so it's not like it's regular work; so to make it worth my while, my minimum charge will be £X if the property is as described!", and I'll then go onto to soften that with a bit of spiel about doing a top job and being experienced and fully insured.
A high percentage of the time they say "No thank you!", or "Can we get back to you?", but I do end up with a small amount of very well priced one-off cleans.
I think they're worth it.