Put an ad in your local paper saying something like high school or colledge students looking for part time work , earn extra cash. Or something like that
I can find dozens of people with bachelor's degrees willing to work for me for $10/hr. Welcome to the US economy. You just have to look. I did an ad in CL, it cost me $25 to post.
Just be aware that once these students figure out what you are doing...you are likely to have new competition :( it's the risk vs. reward of hiring cheap non-related staff
Yes, run craigslist ad if you know no one willing. I personally used a neighbor kid (17) Paid 10 / hr and we were both happy campers. Also remember Chinese labor is cheap. If you get your product from China they can often pre-label for you for a small cost. You will need to provide them the PDF of FBA labels though.
amazon will always do this for you, expensive, but at least its done correct and quickly. You can send 3000 units to FBA and its stickered and selling within 48 hours. Do it yourself and you will not be selling in 48 hours and losing sales.