If the User is using the Multi-Currency feature, then the Purchase Price shown on a saved search may be different from what is shown on the item record. The reason for this is that the purchase price amount shown on the saved search is converted to your Base Currency, while the purchase price showing on the item record is based on the Currency of the Preferred Vendor of the Item.
To get the exact value as in the item record, use the “Purchase Price (Foreign Currency)” field in the saved search.
Another option would just be to unmark the Vendor as Preferred and the Purchase Price field will display the amount as it is in the item record information and will no longer convert to the base currency.