Minnowbooster considers 1 SBD worth 1 SBD in post worth. That the internal market is boosting the SBD price to hell and beyond is a sad thing but nothing we can plan in.

Since there is no reliable source of what the current SBD price is, we can't peg to it.

My current suggestion is: Sell the SBD to STEEM and lease from the market ;)