My best day on eBay was $458 profit.
I make money Poppin Tags on eBay.
I have sold on the site for over 2 years now. I sell clothes that I buy at the thrift store.
I tried scaling up and hired a college kid to run it for me and he ran it into the ground. I had to use BH techniques to get a new account because my account was banned.
I am back up to $50 a day. It can be a lot of work because each item is unique and has to have photos.
Cool thing is the profit margin though.
I spend 99 cents on most items and list them for just under $10. So. As Macklemore raps about - With $20 in my pocket, I can pick up 19 items have a little change left over and see $190 in sales on average. I build additional fees into the shipping cost to cover my expenses so typically what my item sells for is my profit.
eBay has limits when you first start. 10 items per month $1,000 max. They have different thresholds for different items. After a couple months you can get the limits raised.
I have a friend that did over $138k in used clothing sales last year. Taxes, fees and expenses took a big chunk with a little over $60k in profit. I will not get rich by sell crap from thrift stores, but it is a nice side income ~PLUS~ the clothes in my closet are freakin awesome.