With Nissan nuts and bolts, run of the mill stuff is usually in the price range 0.10 to £2.00 or so. When the price hikes up it usually means that there is something odd about the part which makes it "captive" to Nissan parts department sales. There are, however, extensive pricing anomalies in the Nissan system!
Wherever possible, MJP (Eastern Auto) offer OEM parts sourced through the Nissan systems but offered at discount rates to enthusiasts as a result of our bulk buying discounts. This may only be a few % on nuts and bolts, but as much as 20% off Nissan list on service items, clutch parts and brakes (most, not all - Brembo parts are expensive!).