Welcome Naemular
Me too Quacko. Maybe if the price was cheaper. It's a small unit and an older design.
As for testing, aside from a visual inspection, inside and out, listening is your best test. Listen for obvious rattles or annoying vibrations. Getting a sub to sound 'just right' can take some tweaking but obvious problems should be fairly apparent if you listen to bass heavy content at reasonably loud volumes.
By the way, how big is the room you want to fill? Mainly music or movies or both? There are lots of sub experts here to help find the best deal for your room needs you if you provide a bit more detail.
