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The commission on bittrex is only 0.25%.

Whether the volume is low depends on conditions.

Be cautious comparing volumes on crypto exchanges, because many exchanges and coins inflate their volume with sham trading.

Relatively low volume may indicate low interest, or just less sham trading.

I think it will be good if even those bittrex transactions will be shared in the post.

I don't think so

Today's SBD Price (Bittrex): 0.74 USD

While
Coinmarketcap says

$0.652090

The price on internal market seems to be around

$0.70

Coinmarketcap includes Upbit in their price calculation, but Upbit has not had a working SBD wallet for months if not longer. People are willing to sell there at a lower price because it is the only way to get their value out of the exchange. It doesn't indicate a market price for real SBD which isn't trapped there.

I would consider the Bittrex and internal market prices as closest to a fair market value.

Coin Marketplace

STEEM 0.18
TRX 0.18
JST 0.032
BTC 87747.34
ETH 3057.76
USDT 1.00
SBD 2.74