SBD is only worth around $1.56 last time I checked: I suspect you are looking at coinmarketcap, which includes erroneous pricing from Poloniex (Poloniex has currently disabled SBD/Steem deposit/withdrawal). We also have to pay a fixed price of $1-$2 to pay the bitcoin transaction fee. If you'll read above, you see I strongly recommend against sending small quantities of SBD due to this fixed transaction cost.