Got a unique product. Should I sell on Amazon myself, or work with an existing seller?

I currently got 1 product in my German Amazon shop (FBA), plan to end with 7 SKUs. Wondering if I should stick to B2B, leave B2C to sellers who have Amazon as their full-time gig. Make a deal with one to sell my products there.

Are 7 unique products enough to run an Amazon shop profitably? Can it justify the time and work involved? Products cost $20 om average, sport toys targeting teens and up.

Lots of variables, I know, but what is your gut feeling? Can an Amazon shop be a good idea, for a part time seller, who doesn’t plan on fighting to gain foothold in any of the best selling categories?