Lady IRS is not after anyone as long as they are honest and report. Ebay fees, etc are deductions. Get a good real tax person Not H or anyone... someone who has done taxes for year sand knows the rules. Keep good records, just download your ebay reports into excell and print them out. that shows all your fees to ebay and paypal. keep reciepts for what you buy for resale and a record of miles for your car ...
there are many more deductions but beware of counting a home office. it gets tricky. other things like computer expense, ink for printing, internet service etc are all legal deductions.
and you cna make up to 12,000 profit (if not more now) without paying tax as you get deductions for yourself and dependents. etc etc.
have fun. keep records. dont lie. simple