I had one like this..went like this:
phone rings
me:hello, ***** window cleaning
him: hi, just wanting a price for mu house
me: ok, can i take your name first, then your adress and number?
him: cant u just tell me now
me: well i have a policy of only being able to price after seeing the property
him: but i dont want that, cant yougive me a price?
me: ( freaked out!! ) i can give you an estimate, but i still need to see the house before, how many windows and what type of house
him: semi, 10 windows
me: ok, around £xx
him: ok well im actually a window cleaner and i want to know your prices, can you help me, like how much would you charge for a hotel?
me: umm, you phoned posing as a customer and now you want my help?
him: yes, us window cleaners are mates, im starting up, can you give me your price list?
me: i dont have a price list, it all depends on the property
him: can you tell me how to get work?
me: umm, i need to go now sorry