The original ebay listing described this bass as
[quote name='"ebay"']This particular bass started life as a limited edition Precision Bass Special, made by Fender USA, which features P/J pickups and a slimmer jazz neck, and has been heavily modified proffesionally [i][sic][/i] with the following features:[/quote]
and then lists all the mods that have been made to the bass, including the preamp, pickups, tuners, neck, pickguard, blah. There's no mention of custom shop in the listing.
Anyway, it's a nice bass and it's worth what somebody's prepared to pay for it.