Just as long as he knows SGP's wait time and it has been confirmed, i see no reason to tell SGP. The only reason i would tell SGP is this....a winning bidder/buyer pays off the motor to the seller, then the motor is drop shipped to the winning bidder/buyer. If it involves SGP shipping or takening payment from anybody other than the original buyer, SGP needs to know.
I think if SGP would just say the motor is legit most the previous posts are pointless. The guy made a careless ad which is STUPID. However, he did correct it once he realized his ways. The bottom line is SGP needs to confirm the motor is or will be built.