Sorry to hear about that.
Be aware that you won't find much in the gear arena (unless the manufacturer themselves or a big box retailer like Sears is auctioning it) on ebay "new in box" that will be warranty-covered by manufacturers. Most manufacturers have lists on their sites similar to Panamax', and I think you can find something comparable on Outlaw's site as well. Only used gear w/transferrable warranties (a la Outlaw) are sure-fire.
Not sure how these folks get this stuff so cheap, but there's one of your reasons, apparently.
I can say this much - your 5300 is a solid unit, have one myself. I've only had one Panamax go out on me in 10 years, and that was in fulfillment of it's intended purpose: defending my gear, which it did perfectly.
Enjoy peace of mind.