Price Varies on Same Item at different branches

I Phoned Goldwagen Krugersdorp for a price on a Bosche Coil Part Number #***. Price quoted was R645. Phoned Roodepoort which is out the way for me and was quoted R495. Phoned Krugersdorp back again to ask why a 25% difference in price. Was told that is must have been a custom order for them and that's the price not negotiable. Surely it is standard pricing at all Goldwagen franchises??? In future I will rather deal with a franchise like Midas. At least you know there pricing is standard across all their branches and you don't have to second guess all pricing received.