If I want to buy/sell parts on FB Marketplace, how important is feedback, profile, and friends?

@ProjectBazza If you're looking to practice patience with strangers, Marketplace is right for you. It's been mentioned before and I'll echo the sentiment: buyers and sellers both have a tendency to completely ignore inquiries or quit responding. Buyers will give ridiculously low offers, they'll be late or expect you to deliver the item, on and on. It takes a lot of patience.

To address your original question, I wouldn't worry about the lack of reviews or your new profile. I agree that if your item is something I want and the price is right, I'm in.

Just jump right on in, you have to start somewhere.