What does 'Newly Overhauled' mean?

I'm looking at buying a Zumo 550 & I've found a supplier with over 30 units in stock described as 'newly overhauled' with a 12 month warranty for £349.99

What does 'Newly Overhauled' mean?

The seller's description: (& his spelling)
Newely Overauled (NOH) To 2008 Version 10 Maps
(Free Upgrade From Garmin to NT 2009 Europe Maps)

Can I assume these are brand new units & not pre-owned?

pentagon gps, Sheffield

NOH or white read link

There's a glut of white box zumo 550 being offered.

As for Pentagon gps then DYOR and search this forum

http://www.ukgser.com/forums/showpost.php?p=1785354&postcount=5

Cheers RAM-man, thanks for the 'heads-up'.

My man Roy Gardner is servicing my GS next month & he's a Garmin dealer. I'll ask him.