bra.biz has some commercial prospects, more so than the others. You won't see much of a price for the .biz amongst resellers, but I recently sold a two word .biz for ยฃ2000 GBP of a similar (actually slightly lesser) search volume to an end user, which is what I would hold out for.
The other names are low $xxx reseller max again, but you could find a bit of luck with end users. 'Head' is a major brand and dominates the .com space, but you should be able to find some smaller companies for which it would be an improvement for their domain.