Welcome. ?
The short answer is yes. But I think your dealer meant they will give you bottom book as the trade in price and then sell on.
I don’t think they meant they’d auction it on your behalf. I have never heard of that. I PX’d my car in on my X1 and was given a low but fair price by the dealer. They then sent it to auction.
Either way, I suggest double checking with the dealer.
? I will be remembered for nothing but had great fun doing it ?