Delphi high pressure pump

[Llewelyn]

Sorry to keep on about this but there's several hundred quid involved here...

Is there any point in getting a secondhand pump from a (claimed) low mileage engine? There are several on ebay from the same seller, I'm assuming that it's a breaker and they're from accident write-off cars (I suppose he could be going around stealing the pumps...)

Going rate seems around the £160 mark for a tidy-looking pump with the pressure regulator. I can get a new pressure regulator (flagged as malfunction by the fault code P0251) for about 70-80 quid but if it's malfunctioning because the pump is shagged (and I wouldn't put money on that not being so) then that's a waste of money.

The question really comes down to "do I spend around 500 quid on a new pump, or chance 160 on a secondhand one?" However, I have no personal experience to influence the decision, so if any one has fitted a S/H pump, did it work, did it carry on working or did you regret it and end up buying a new one anyhow?