I say go for it. Why not? If they end up sounding like doo-doo, it’s probably still an upgrade to what they currently sound like. Have fun with it.
I had a pair of White Van speakers back in the day. They got my old man, not me. They sold him some “Becker” carpeted home speakers. They told him they were extras from a movie theater install, yadda yadda yadda. He thought they were legit speakers because he’s a foreign car mechanic. The real Becker made OEM stereos and speakers for Mercedes and I think BMW, but not sure about BMW. Either way, he thought he was getting a deal on something good.
Underneath the carpeting, they were particleboard. No crossover. The level adjustment to the mid horn and tweeter weren’t even hooked up. Just an empty particleboard box with 3 drivers of horrendous quality all hooked up to each other and a crappy spring speaker connector terminal. He paid about $50 for the pair. $25 would’ve been the most I’d have given them on a good day. But in all fairness they served as basement and garage speakers for quite a few years until I moved and decided they weren’t worth the effort of loading them into the truck nor the space they’d take up. I left them to the landlord who was fine with me leaving them.