I have read some but not too satisfied on how to get online business with domains. Any idea how, just like how to register dropped domains with high PR or deleted domains. Thank you.
Have you tried using sites that create lists of dropped/dropping domains. I belive NameDrop.com is a popular place the DP forums.
Expired names can be snapped from Snapnames.com Namejet.com etc. It is just a matter of time before you learn this tricks and have some budget of your own to get it rolling.
My suggestion is to read all you can about domaining otherwise you'll waste a lot of money like many, many people. From reading your comments, it seems that you are a complete beginner. Consider reading stuff on forums like Namepros.com, DNForum.com, sites like DNJournal.com, past sales from Namebio.com & DNSalePrice.com
ipalert.com has a service called pddw - pending delete domain watcher. there are a lot of names being bought on the aftermarket vs. hand registering these days. i am affiliated with the site fyi and am biased. you can also start by reading dnjournal and following the sales charts so you can get a feel. remember that you will have renewal fees on names and names are not necessarily liquid in value. short names, dictionary names, geo's etc are more liquid than a 3 word .whatever fyi. developing your names vs. parking them is going to be a choice as well when you acquire names. one of the best aspects of buying domains is when you acquire one's that make you want to develop them fully.
Be patient with finding quality domains they are hard to get but some slip through the cracks, but even some bad domains can be worth a lot to an enduser
Take your time learning what makes a valuable domain. Browse trough different domain markets. You might need some capital to buy the domains. In many cases you have to sit on them for a while before you can sell them.
I suppose you should have a feeling about domain names. Which domain name is worth to be invested in and which not. And keep eye on the huge lists of expired domain names.