As someone who just built a pickup bed trailer....meh.
The OEM frame is extremely heavy and looks bad (IMO) when towed. The OEM axle and hubs (and brakes) are also super-heavy. I originally planned to just use the OEM stuff, but in the end, I ditched everything buy the bed itself and built my own frame using trailer axle, springs, etc. Much, much lighter, looks better etc. My build thread (mighty max trailer) is like right below this one in this forum if you want to take a look.
Now, for $250 if you just want something to haul mulch around, it's probably fine if the tires are good and it has electrical hookups. Else, you can find pickup beds practically free on marketplace and scratch-build for not a whole lot more if you can weld. Depends on WHAT kind of build you want to do with it....expedition stuff, just utility hauling, etc....bed is great for certain things and not ideal for others.