How can I get IP Addresses? I would like them for doing my online business... I wonder if there is a place to buy or to rent!?

Usually there are 3 ways of getting IP Addresses.

1)Buy
2)Rent
3)RIR Registration

For buying, it is the most costly option and usually takes you quite a long time to search for the sellers and best deals. Renting is the most cost-effective way to get IPs. Although you cannot have full ownership of the IPs, you can get the IPs within a few days and no complicated procedures are involved. For RIR Registration, you can get the IPs (maximum /22) within a few months. However, you are not guaranteed to get the IPs even if you applied.

Recently, I heard of a website which provides the following services maybe you can take a look.
https://www.laruscloudservice.net/

to find a server provider, rent his computer host, and you will get an IP Address of you host.
try Linode VPS.