I can answer this..... the reason it sold so low is because ppl are fuckin cheap and dont wanna give you a decent price for your used equipment. if you have an amp, say a sundown XJY1625.1, that you bought for $299 and had it installed for 3 days, right?
come on here or another forum and sell it for $260 shipped, 10/10 cosmetically and mechanically, show ppl the receipt and these fuckin jerkshots still wanna offer youu $200..... even though $260 shipped is your bottom price.
in essence theres ZERO/NOTHING wrong with E series subs. just keep in mind you never and/or rarely get your money back or the money you're seeking sellin used car audio.....