You answered your own question: "zero"
While someone (else) may fall in love with it and give you what you want, it's unlikely...
What's more likely is that someone would like your content enough to want to purchase it, but the return would be pennies on the dollar of production cost.
The domain? I bet BobPusher.com or CarlPusher.com or whatever is available, so, zip on that, even if someone wanted to continue the "pusher" theme. You'll object to that and go on about your "brand" but a brand is only as good as the number of people who know it and the money it generates -- cut the revenue and the brand is worthless beyond being a nostalgic memory for the founder.
Designs (even great ones) are a dime a dozen these days, facing similar supply/demand pressures as content sellers. For a few hundred bucks a new owner could get a new responsive site built exactly the way he wanted.
What you have, as is, is a turnkey business for someone who is willing to immediately pay more than what you would get by letting it autopilot. Without the revenue stream (the full package), you have a hobby that someone isn't going to pay you for just because you're bored of it.
Take a look at this thread for additional perspective:
https://gfy.com/showthread.php?t=1135002
But you're right that now is a great time to be buying up adult websites if that's how you want to spend (I did not say "invest") your money...
Of course, everyone's mileage will vary
