I would think most end users to be new to domain buying and therefore you would be more successful in selling were you to use the services of AfterNIC or SEDO.. You could use Escrow.com but its not really geared to domain sales.
Bonus of using AfterNIC or SEDO is that if the buyer decides to buy another domain other than your, you will still get the referer commission from the respective programs. (and its legally contractual)
However based on SEDOs Lame and over complicated way of getting Verified, I would go with AfterNIC every day. (i have had 3 people request sales from whois because they could not grasp the concept of sedo' verification.. end users like to enquire before a sale from my experience.)
AfterNIC offer a landing page that explains the domain and allows you to bid straight off the page. You have to be prepared to give up the parking revenue when the domain is parked on a AfterNIC sale Page, but it is effective and there is no confusion as to your intent to sell.
Brilliant. I suppose you could also just point it to the domain itself and have a landing page that explains about the domain and the price, rather than going through Sedo or Afternic?
If you are to sell a domain via email. Take the time to research the domain, quote google results and how much the potential buyer would spend on advertising each year and compare it to the price of your domain. Point out that a domain name is an asset and my favourite... ask them if they could afford to allow a competitor to purchase it.
So many domainers just quote price with extreme arrogance, offering no justification. Not everyone is a domainer, take the time to really proof your pitch, offer a multitude of services for payment. More importantly swallow your pride, this is a business transaction afterall. Believe me, your bank account will appreciate it.
Never take anything personally even if someone is claiming trademark, you are more likely to resolve these matters fair for both parties.
Just remember the namestrands-ism:
You catch more flies with honey, than you do with vinegar.