Hi mate thanks for your feedback.
personally I only sold items that I knew the shop would not sell out off, also I looked for the same items that where sold in different shops too. Back up.
once I created the advert that was pretty much it, it ran for the 30 days then I just rolled it over again when eBay offered free advert listings which they revise ever 3 months too so you can grow
I'm not sure about the $100 business that's too much of a risk for me I went for the low end items that cost me $2-5 then sold for $10 but I worked on volume to lower the risks -just a thought!
postage I alway always went for items that where light under 1kg for sure I spend 2 weeks in 'beta' learning but you soon pick it up!
This is also a great idea if you spot something thats got say 70% discount, but you don't want to pay up first, obviously you can put it on eBay for 20% discount lol it works there is no risk really, at the end of the day what works for me may not work for someone else!
Cheers
Philip