Yep, unfortunately you should've taken the 12-15k when you had the chance. Putting on BAT with all those closeup pictures unfortunately is where you went wrong.
Don't take this as being rude, you asked for opinions and this is what I see: It's a longbed (shortbeds regularly sell in the mid-teens), MAACO quality respray in a non-original color, lots of dings and dents all over the truck, bed floor is pretty beat (truck has been worked hard), brake pedal says 209k miles, needs the seat redone, dash pad is cracked up. Essentially, it's a worn old truck. It's a great starter truck that hasn't been screwed with much, but it's also not a hard to find version of these trucks. The number one place where you messed up was painting it. As it sat with the original gray/red on it, I would've been glad to pay $6-7k for it depending on how it ran and drove. With that cheapo paint job (and unfortunately, shiny paint just further highlights the body issues), I honestly wouldn't even be interested in the truck if I were shopping.