I dont think you want to know what your hourly rate is. Look at it this way, what would you be doing if you were not doing e-bay, can you make more money or do you need more money, then you better go find that. You forgot to calculate in your packaging supplies, tape, paper, bubble envelopes, boxes. How about your time driving to the post office and standing in line, how about your time at the garage sales or where ever you get your items. I look at it this way, if I make a dollar, then its a dollar I did not have, or would not have if I was not on e-bay.
Bill.