Same, have mainly sold on eBay to get rid of stuff around the house, but have also bought items at op-shops/garage sales and resold, sometimes doing them up a little in between, or just on-selling as is.

Because of the ridiculous Aussie Post prices, just gone up AGAIN too, I will be stopping my selling for a while, perhaps only focusing on furniture items that are pick up only. 

So, goal is to either sell less or to sell cleverly to avoid excess fees!