These are a few things you must buy if you don't want people to call you out.
1.Ceramicspeed T47A BB, it comes in anodized blue, it is solely made for factor bikes and comes default in the genuine pizza box
2. Black factor bartape. comes default in the pizza box, and it is also a really good bartape.
3. Original headset spacers set, the transition spacer has the "SLT by ceramicspeed". But you don't need to change your headset bearings to the SLT ones, as no one will be able to see your bearings.
4. Black Inc bottle cages, the titanium screws have printed "black inc" on it, will greatly reduce the suspicion, say they are complimentary from the bike shop, make it seem genuine.
5.original seat post cover that has the factor logo imprint
6. rubber grommets cover for DI2/AXS, those small covers have the factor logo imprints too.
I mostly ride for myself, not others—but thanks for the detailed list!

The most basic items I'll likely go with are the Black Inc bottle cages (I prefer the aero ones since they're the same price as the regular) and the Factor bar tape. That’s about another $150 I can invest in. As for the CeramicSpeed BB, $350 feels too expensive and not worth it in my opinion. For the grommets and seatpost cover, you can always just say you lost them.

I also ordered a Black Inc wheelset, but the seller told me it's coming in a separate package—which I find doubtful, since I paid for shipping once for both the frameset and the wheelset.
Overall, my experience with Yahoo hasn't been great. They barely respond on WhatsApp, and I had to ask five times just to confirm whether the wheelset was shipped. Their replies have been vague at best.
I'm picking up the frameset tomorrow, but in the past two months, I’ve received only one photo of the frame—so I haven’t been able to check the frame’s condition or any details.
While Yohoo has a solid reputation, I’m feeling a bit skeptical based on my experience so far. Just curious—has anyone here dealt with Yahoo or other Chinese vendors and had a similar experience?