So I have a red prius prime coming to me with a very small window to delete the all weather liners. Folks are they worth it? Is the cargo mat worth it? $259 from Toyota
Early congrats on your new Prime! I had them come with my Prime and switched out to Husky liners. I had Husky in my 4Runners and love them. The Toyota version has an okay wall, but don’t fit snugly in the foot area like Husky (or WeatherTech). I did keep the Toyota trunk mat.
The Prius Prime trunk mat is pretty nice - definitely worth getting. The floor mats are fine, but they may not have as high a "lip" around the edges as other higher-end mats. They have been working very well for me on my 2018 though. I got my trunk mat for $100 from E-bay by purchasing through a Toyota dealer. (who just happened to be the one I bought my car from). You may want to take a look on there for authorized Toyota dealers.
We've been very happy with Weather Tech cargo/trunk liners in our Primes with roll-up removable bumper protectors: