and if u sell a $100 for $99 on auction and add a buy it now for $129 still not worth it?
Correct. EBay charges 10% seller fees, and PayPal 2.9%, so you're automatically down to selling at 87% if you sell at face value, below the current lowest going rate here. And that's besides for buyer scams... (These numbers are assuming 10%, of course. If you're doing the $10 max selling fees or something, it may be more lucrative.)