I didn’t realize that. I’ve only bought one firearm through an FFL seller. Sold it a couple of years later. (regret regret regret)
I know plenty of people who have bought multiple firearms at one time though. Who could even guess the number of private sales in the last 100 years? Guns wear pretty well after all.
Two years ago, I bought my Wife a Springfield XDs .45 for her CCW, and was talked into a lever action Rossi Rio Grande 45-70. Used the same 4473 for both.