I reached a Sales Manager and he said that although he would take the car on a trade, it wouldn’t qualify for the rebate due to the salvage rebuilt title.
Thus, it most likely makes no sense to trade it in expecting they will pay a reasonable value for the car AND be willing to deeply discount their own.
As always, separate the trade and shoot your shot on the new lease.
No dealer wants a loser deal and a loser trade anyway, and now you know the trade-in credit doesn’t apply.
I would donate this thing to a charity, take the write-off, and move-on. I wouldn’t want anything to do with a private party sale on a salvage vehicle.
It you’re committed to selling it, a buying service (list Max posted) will take it off your hands, but if you want top dollar you may need to list it somewhere like auto trader and make the Carfax available. You want someone who knows exactly what it is and dngaf. I wouldn’t try and sell this on CL or FB Marketplace, and I would still expect a fair amount of tire kicking.
If your Audi has a non-dealer mechanic it has spent time with (no judgement if it’s a situationship or monogamous), I might make them aware you’re selling it in case one of their engine sludge customers finds themselves needing a car quickly.
The car hasn’t been in a mechanic in years.
I perform all maintenance in my garage, and besides regular service (oil, filters, brakes) the car has only required a new relay for the HPFP and a PCV valve (that I’ve replaced myself).
I see no real benefit on donating it since I still enjoy the car and it runs great.
Last fall I drove to the NC mountains on it and it was more fun than any other cars I had there in the past.
EDIT: I also don’t wanna be that guy that comes here for advice and ignores it completely.
But for an extra $1500 you might?
TBH most of us are shocked when people take it.
People really don’t like being told what they need is a minivan.
I wouldn’t give it away on a trade, I’d expect a few thousand dollars at least (on top of the 1.5k).
There’s no scenario where this is realistic
The push gift that seems like a bowling ball but will be more treasured than diamonds.
The truth hurts… 
Keep it or sell it private party through forums and/or CL, FB, etc.
BaT and C&B won’t take it. Dealers don’t want it.
I dunno, I feel like these days you can get a few thousand bucks for any decent running clean looking car, salvage title or not.
If you want to sell it I’d put it up for $5k or so on CL or FB Marketplace etc. as max mentioned and see if you have any bites.
Not when it’s an Audi with 250K miles. @AndreG I’m not tying to roast you here. Just saying it’s highly unlikely you’ll get anymore than 1K for that thing, and that’s being generous. Like others said, try to sell it privately
I do think that if I wasn’t asking for the dealer to lose a lot of money on the sale side I could ask for more, but that’s not the case.