The price of CompTIA Security+ is different for different places like the USA, Britain, Australia, and Emerging markets, etc. CompTIA Security+ costs USD 370 in the US to buy a voucher for this exam. There are many more other plans like:
- you can opt for the Security+ exam and also retake in USD 549
- take the exam bundle consisting of exam voucher, exam retake, eBook to practice, and the CertMaster Practice for Security+ exam in USD 699
- another option contains the exam voucher, retake facility, CompTIA Integrated CertMaster Learn, and Labs for Security+ in USD 949.
You can choose according to your budget and requirements. The best option that I will recommend would be to buy the voucher and take up an industry-grade CompTIA Security Plus Certification to help you get up to speed. Also, have a look at the following video on Cyber Security Training to get your fundamentals correct.