If i receive such a reply, i always ask them what their desired price is. I don't recommand to make such an extreme price cut (halve the price or even more!) immediately after receiving a "too expensive" reply. That only gives them the impression that the name is not worth much if you (seller) are ready to do such a price cut so fast just because of a "too expensive" reply. In no other business will you receive such a price reduction. Therefore that only makes your position very weak right at the start of negotiations.
Just my 2cents and my own experience.
Hope you don't mind.
edit: to be more detailed. when you receive a "too expensive" reply, that means the company is interested but would like to have better (or much better) price. Now if you reply with a question how much they were thinking about, normally they HAVE to give you a price (because of their first comment) otherwise they look stupid (why saying "too expensive" if you are not interested at all ? in that case you just say "no thanks"). and after you receive their second reply (a price, even if its too low), that paves the way for a Sale!
But if you reply with a much lower price than your first email, you might get such a reply "hmm, i thought about the whole thing and sorry i am not interested in this domain".
hope you understand what i mean.
One thing you could do if selling to a computer store or anything is ask if they will give you a discount for their products equal to the reduction they expect from you...it is cheeky but it gets the point across that you are not there to waste your time or hand over your property to anyone for next to nothing. If nothing else you might get a computer for 50% less than the ticket lol
Often a 20-30% reduction on your domain price can be negotiated if you want and should be, no one ever pays by rate card when the price is not fixed and if they do they would go out of business.
The only thing you have to remember in any business deal of any sort is that you have a service they want, they have a service you want and neither of you have to give up so much to the other.
ALL businesses negotiate on prices, it is the nature of the beast but no one reduces their prices by 50%+ unless they are having a fire sale. If the domain is of good quality and there are a few end users you should be able to negotiate something...even if it is good service in the future.
edit: to be more detailed. when you receive a "too expensive" reply, that means the company is interested but would like to have better (or much better) price. Now if you reply with a question how much they were thinking about, normally they HAVE to give you a price (because of their first comment) otherwise they look stupid (why saying "too expensive" if you are not interested at all ? in that case you just say "no thanks"). and after you receive their second reply (a price, even if its too low), that paves the way for a Sale!
But if you reply with a much lower price than your first email, you might get such a reply "hmm, i thought about the whole thing and sorry i am not interested in this domain".
hope you understand what i mean.
I can clarify what you mean if you don't mind..
For the questionee, if you went to someone and asked how much a jacket was and you got told that you could buy it for $1000 and then 2 seconds later the salesman was throwing the same jacket at you for less than $500 you would be wondering what the catch was; no one gives a price cut that drastic except for Kirby vacuum salesmen that lock you into paying for years for a service you do not need.
You may have given them a great discount, but it will only panic them and wonder if you can do it then what is the catch and why are you trying to offload it so fast.
I still stick to my advice of trying to negotiate a price cut for yourself on their services equal to what they get out of you...people love to win and this makes the game so much more fun and also opens up lines of communication in other ways, always try to think outside of the box in anything you do and try to think up a service they weren't expecting.