Shopping Addiction Support Group
Oniomania (also known as shopping addiction), is the compulsive desire to shop. Similar to other compulsive behaviors, sufferers often experience the highs and lows associated with addiction. The purchase generates a mood of satisfaction, gives their life meaning, and lets them forget about their sorrows.
I have a friend that does what you do except she goes to a place in Phoenix, AZ called Last Chance. It is the only store of it's kind in the US. It is all Nordstrom items and you have to be very careful. Things can be damaged and stained and you name it. She knows what sells and makes huge $ doing it. But she's not doing it daily or even weekly.
Why don't you try listing all that you have now before you buy any more. Sell it all and THEN if you must, thrift again. I agree though. Your family will give you much more satisfaction than $ from eBay or shopping at thrift stores! Kids don't stay kids long and they need you.