Help with a study laptop

Hi. My name is Queen Musia 27 years of age. I am going to register for a second semester in May at UNISA. I want to do a Degree in Accounting but because of Math litetacy I have to register a Higher Certificate in Accounting first for a year and then register Bcom degree after the Certificate. With that being said, I won't be able to get NSFAS for that year and I'm going to need a laptop, that will make it easy for me to access my school work and do my assignments on time. There are second hand laptops at Cash Crusaders at a good price and still in good condition, but i can't afford it. So I was asking for help to raise that money so that I can be able to buy in time. I do not have much of a story to tell but your help will be highly appreciated. Thanks to anyone who will be able to assist. God bless you all.