Its too difficult to tell by the pics and the angles given his description says solid lumber and if the dims are solid the side and bottom rails look like 12/4 by 6 maybe 7" the head board looks 6/4X6 or 7". Excluding the brackets/ledges, block feet under the foot board and Bubinga I count just under 66 bf.
I framed for a living for nearly 30 yrs the rule of thumb was a minimum 15% would be useless and that's framing lumber. Lumb. yds aren't in the buss to pick through piles to find the good stuff for you but to fill trucks to keep them on the road. National mills that supply lumber for the furniture industry should be working it different especially if they want to keep customers. International mills dealing in exotics might think different, (shipping X amount of unusable lumber) might be your prob not theirs.
I don't know, I try to keep things simple and buy local or regional at worst. I traveled 100 miles up and back for walnut one time. I worked the wood much more to get it right but I got much more than I would have otherwise.
The last bed frame I made cost me about $700 for all the mat, oak mahogany, 3/4 ply brackets bolts drawer slides etc., etc. I hand picked the oak and mahogany.
Work smart not hard!
Never bite the hand that looks dirty