I recently saw a good reported sale of a domain name I had inquired about a couple of years ago. I made an offer via email and the domain owner told me it wasn’t for sale. I have no idea whether it wasn’t really for sale at the time or whether my offer hadn’t piqued his interest.
The sales price looks reasonable, and it wasn’t that many thousands of dollars from my offer. Had the previous owner given me that price when I first inquired, I am almost certain I would have bought it, since my opening offers are generally not the most I will pay for a given name, and it was certainly in the ballpark.
The moral of the story is that if you receive an offer that makes you want to sell the domain name, you might consider getting in touch with the people who previously inquired about the domain name. Even if you set a price higher than the high offer, you can possible make more money. Circumstances may have changed and it may bring back interest in that particular domain name for someone who had previously inquired.
At worst, you waste a day or two waiting for a reply. At best, you can generate some incremental revenue or create a private bidding war between two interested parties.