Granite Countertops Cutting/Installation

[Jeremy Taggart]

So I found some cheap granite countertops on the Facebook marketplace that someone is trying to sell but my countertops are a different size and layout than theirs. Has anyone bought Granite on Craigslist or marketplace like this and then cut it themselves or hired a granite installer to cut and install them? I want to get them because they are so cheap but not sure what direction I could go to get them cut. Wanted to hear some opinions.