Just buck up and buy FCP on eBay. If you’re planning on being a pro editor, you’ll spend thousands to have and use proper equipment over the years. Get used to it. Now, I wouldn’t hold off on buying FCP on eBay because the prices and demand are going up every day! I bought a sealed Academic version for only $350 a couple weeks ago. I have one workstation that’s still on 6 and since Apple has given me choice for upgrades, I went this route. Only difference in Academic version is that you can’t get upgrade pricing for newer versions. Well, since there will be no more upgrades to that software, that’s a moot point.
Oh, and I would never buy “a serial number” online. I would look for a new, sealed, and never installed version if I were you. I’ve seen some crazy crap like “I have it installed on ONE machine so since it’s allowed to be installed on two, you are buying the licsense for the other machine”. Not good!
Tony Brittan