Yes you can make money, how much you will make is the right question. Judging from the only picture you have posted on CMON, it will not be much right now. Don\'t get me wrong, I think your white ninja is nice and currently underrated, but there are lots of VERY good people selling stuff on eBay and it\'s a tough competition.
If your minis fetch around 6 on this site, you will probably not make much over the cost of the minis, the paints, the brushes, the eBay fees, ... It might still be a nice way to get a bit of money back from your hobby, but surely not worth the effort as a business. A good way to judge what you are worth is to look at the news, the auctions ending today section. Look at those that have the scores you are getting and watch actually have bids on them. When you see that
This has no bids at 20 USD, you might want to think what the white ninja (comparable but imo slightly inferior) would fetch.
In the end, of course, just try it, you\'ll see. The investement is only a few minis and doing what you like (painting, I hope you like it

)
Good luck