JeeJee,
try to find more potential buyers
(I would say in 1hr.info case arround 100 or more, and do not limit this to a certain industry)
Problem with your domain is, that the .com is also for sale (stupid price -lol).
The .net is used by a not so popular web hosting company.
The .org is taken by a PPCer
This makes the TOP potential buyers shrink
If you do not know the name just use the company name.
A
WHOIS lookup also gives you something to base on.
There are no real tricks to approach the end user.
--> Just be polite, be proffessional, tell the truth.
Concidering your doubts about spam:
For shure there is the risk, but you can/should minimize it by applying the basic rules stated in this thread.
(A 1 by 1 mailing is no spam)
Good luck
