It is sometimes possible to find out who owns a domain by looking up the WHOIS information. If it’s available, you could then contact them directly about purchasing the domain.
This may be the only real option if a domain is actually in use and the owner isn’t already looking to sell. Of course, that’s going to require a much higher price tag than a parked domain.
Most people who are trying to sell domains are already listing them with one of several domain reseller marketplaces. This is usually the best route, if available. Domain resale marketplaces include:
- Domain Name Sales
- GoDaddy Auctions
- Domain Holdings
- Media Options
- Hunting Moon
If the domain name you are looking for is not already listed in one of those marketplaces, you might also try acquiring it through a domain broker. Several of the companies listed above provide domain brokerage services.