Fork springs are sold in pairs. $98.00 is a good price for a pair . But, unless they are doing goldvalves, $400.00 sounds aweful expensive. It isn't that labor Intensive to change fork springs, inverted or not.
you gotta figure: $98.00 FORK SPRINGS
$12.00 FORK OIL
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$110.00 PARTS + TAX
$290.00 IN LABOR?????????????