It's pretty simple. Pay BaT $99 to list your car. You're assigned a BaT advisor. If seller agrees to no reserve then the advisor doesn't have much to do. BaT will get a commission. If it's a reserve auction then it should be the responsibility of the advisor to explain that the vehicle is more likely to meet reserve if the seller provides some if not all of the following... In the case of this e9;
Compression test
Under carriage photos on a lift
Diving video from inside the car
Photos of body VIN stamp and matching engine VIN
Photos of each individual work order receipt
Paint thickness readings
Be responsive. Attempt to answer ALL questions
(Just noticed e9 inspection sheet said tires are from 1987! Says alot about the seller

)
Seller did none of the above. RNM. BaT gets no commission. Car still hasn't sold in offers after the auction. I'll guess the reserve was somewhere north of $30K. I think it may have gotten there if presented properly.
Sorry to be long winded but this e9 listing just adds fuel to the "e9 values are plummeting" argument. In this case it was the seller's fault (and partially BaT).
Like Dick said in the comments:
"It's easy to buy a car...it's a lot of work to sell one"