if you want to scam people into paying really high prices, like on ebay, then...well...
You realize that with an auction style listing the customer sets the price right?
yeah I meant when you search on ebay all you see is really high prices (add shipping) for s5 or s3. its true fees are high, but i sold some stuff (not bitcoin related) and once in a while you get reduced fees, etc.
edit: looking back at my last comment, "scam" might of been a bit harsh ด็้็้็้็้็้༼◉Д◉༽ด็้็้็้็้็้