Jackpot.com was the highest selling domain name in April 2012.Jackpot.com was sold for $500,000 through Moniker. Here are the top 15 .COM domain name sales in April 2012 :

1. Jackpot.com  $500,000
2. Indi.com   $115,000
3. Bohe.com   $85,000
4. WirelessPhones.com   $70,000
5. PrinterCardridges.com   $60,000
6. Acronyms.com   $60,000
7. LiveDoc.com   $50,000
8. Mergers.com   $50,000
9. GameGlobe.com    $50,000
10. Seri.com   $45,000
11. Zuke.com   $40,188
12. Rover.com   $40,000
13. Dangote.com   $40,000
14. MyLinks.com   $35,000
15. GreenJuice.com   $35,000

Source from http://www.domainnews.com

Now the .asia domain only cost 6.9 USD for the first year
other domain name you may need.
.com  only  USD  9.77/year
.net   only   USD  9.77/year
.hk    only   USD  22.63/year

To register your own domain name, check out :
http://www.eranet.com
http://partner.eranet.com