Well for one thing the Maverick 88's barrels are compatible with Mossberg 500 model barrels within gauge and capacity.
The choke tubes are interchangeable with Mossberg Accu-Choke tubes.
Maverick 88 model barrels are equipped with 3" chambers and handle factory 2¾" and 3" loads.
That price seams good if it includes tax.
If you want to buy a PD shotgun and enjoy accessorizing it, the Maverick would be a good (inexpensive) one.
My personal preference runs to the Ithaca Model 37 Defense Shotgun.
I'm old school but you knew that.