[CentOS] About centos fresh install

Hi, first of all i want to thank you all that do this help. Without this i cold never put my own webserver. Now my question. I know when i have to install some software, they recommend a "fresh" install of centos, but my provider (we have server via internet and webmin) every fresh install says that i need to pay like 50$ ( alittle expensive for me). Im live i Costa RIca and here internet sucks thats why i use panama server. Now my question is: theres any form to restore to "default" a centos server? like windows 8 or like norton goback? i searh a lot via google but not sure if theres no way or i dont know how to search it. Sorry for my bad english. Hope could help me this time