BaT is where this car needs to be in my opinion also. I sold my Bavaria back in 1994, and I still miss it 28 years later! I had it for 14 years after buying it in 1980 from my father who bought it new in 1972 when I was 13. Talk about emotions tied to selling that car! He passed away in 2017 at 90, but for many years, going back 30 or so, we used to talk about what a special car the E3 was for BMW's future success and "someday" the world will realize that (generally we'd get on this discussion when talking about E9 prices vs the E3, lol). The Bavaria was "it" for BMW (was the common theme of our back-and-forth reminiscing sessions) and how it jump started the company into real performance sedans, and as my father would tell his story about how through the 1960s he owned two C2 Corvettes (both stolen) and then bought a 1968 Firebird 350HO, and then stumbled upon this thing called a BMW. One drive in an E3 (2800 initially), convinced him this was the perfect all around car (fast, great gas mileage, huge room, four wheel IRS and disc brakes, etc).

He followed up the Bavaria with a manual 733i E23 in 1980 followed by a manual E32 735i in 1988!
As I look over the beautiful pictures of your car, tons and tons of memories flood my mind from experiences my wife and I had with it (like winning Best Bavaria at O'fest in 1982, first year they had that award) to simple things like the location of the electric fuel pump I see in your spare tire well (I probably stupidly chose a location under the car when I switched to triple Webers, but it worked there for many years), etc,etc.
Good luck with the auction!
P.S. Re the no space grill badge -- I'd keep that too! I have a stash of original BMWCCA small window stickers with no space. I take some weird pride in placing those on our M2 and E90 M3 (having been a club member since the 1970s).