Thoughts/opinions on Blueprint Engines 408 stroker crate engine?

Currently I have a good running, low mileage Magnum 300 crate motor that is plenty strong but not exactly thrilling in its current state. It certainly feels like all of the advertised 300 horsies are present but that doesn’t go as far as it used to. I’m tossing around the idea of selling this motor and swapping in a built engine.

What do you guys think of this combo? Are there any serious deficits in the parts selection? Anything that you would do differently?

Mopar 408CI Stroker Crate Engine | Small Block Chrysler | Fully Dressed | Roller Cam

Secondly, what is a fair asking price for a healthy stock drop-in ready Magnum 300? I’m not necessarily looking for top dollar. Just a decent price that will offset a chunk of a new crate motor.

Thanks for any input!