well it depends on what you sell............
I have been selling on ebay for a couple of years and we do "ok" but by the time you pay listing, final value and paypal fees your profit is greatly reduced.( plus if the IRS starts taking their share too??
I sold newborn diapers ( pampers) for a while and did great for a month ~ then nothing....??
My DH sells high ticket items that we get for a bargin from Bass Pro outlet. he does well with most of them ~ but spend a lot of time researching what is selling well
I have never sold clothes before so I cant help you there.
mainly you just have to decide what you will be happy with ~ to me selling something and only making $5-10 is not really worth the trouble.( I know it adds up but the time is a factor too with 2 small kids). We like to make a bigger profit

it is VERY addictive though~ I cant stop looking to see if I have bids LOL
good luck

lesley