I've sold quite a few items on eBay and one thing I noticed when my sales were really popping was shipping gets a little chaotic for me. I would weigh and print my labels myself and use the USPS online service. I'm always looking for a way to improve and notice so many sellers selling big,heavier items than I am and offering free shipping!? I understand their profit margin is probably big enough to do so, but I'm looking for advice on how most powersellers ship their items. For instance I know UPS has a business program. Is there anyone out there that can give me their insight on this. Thanks so much!