I prefer to just tell the client to go with the guy who says they can do it in a week. Often, the client returns to me in a few months' time, having wasted a lot of time and money on the other guy and equipped with a better understanding of why they require my services.

Had a similar experience selling my car.

It was an old Audi S3, like, 2011 model. Had a guy tell me the car was in better condition and the asking price was less than what I had listed. My car was listed at $10K AUD and that car was listed at $8K.

Them: "Why is your car listed at your price, and not matching this car?"

Me: "Well for starters, that cars in Adelaide, we're in Brisbane. If you want to go to Adelaide to check that car out and find out it's been in a bender and had most of it's body fixed and the listing avoids that. Be my guest."

Them: "I doubt that, I think you're asking too much. Will you match that price?"

Me: "No."

Them: "Why are you wasting my time, I should buy that one just to annoy you.'

Me: "You fucking do that then, laters"

I sold my car the week after this for the price I wanted. Straight up https://www.reddit.com/r/choosingbeggars material.

This is true. It is less pain for you in the long run to be free of people who believe magic occurs in nanoseconds overnight.