That is an actual XS Power brand battery holder. Making it cheaper, it won't have the same over all fitment or detailed machine work.
To say it's $20 worth of shipping, $50 worth of materials & packaging, and $50 worth of machine work is an understatement.
the MSRP on 597
is $219.99 without shipping. the audiosavings price is a deal.
If it's for your rear battery, you could buy this one for $20 less
XS Power Batteries 570 - XS Power Battery Hold-Downs - Overview - SummitRacing.com