Thank you guys. I spent a career chasing recalcitrant vendors and I am not a patient person. I already stepped on my own toes by disclosing rarity of CF grips which seller then posted on the auction.
When I log into gunbroker it says "congratulations". However, I have not received email notification nor has seller responded to my email request to affirm my intention of sending him money order. (This is that new car with no gas or gun with no ammo circumstance).
The guy's numbers are impressive on gunbroker. But, given the previous attempts to correspond, combined with the testimony of others, I do not have a warm feeling about this.
If I have no response within 24 hours I will invoke "Termination for Cause" which is a valid remedy for a nonresponsive seller. Backup plan is to buy another R9, of course!
If this guy had responded he would have already known the Express Mail tracking number with postal money order enclosed.