Why few quotes are high !!!!

Most often the companies will try to compare quotes when they're trying to purchase for their company if the purchasing is bulk, this will help them to get cost effective and get a best price with in their budget.

But few times there will be difference between vendor to vendor quotes because of following reasons.

• Grey products, most products are available in grey market which are similar to original. Even it is challenging to companies to identify the fake product, the best solution is try to check warranty terms in product site with product serial no or service tag.
• Shelf products, which are already in stock with vendor and they're trying to clear it with low price, this may be having old dates and you may loose some warranty period , please check manufacturing date. Specially with Apple products, the warranty starts when we connect to Internet and get that product register.
• Few of them wanted to get offer from client for first time to get on board in to clients systems, but not sure about after sales support. 
• After sales support : Even all commercial IT equipment will have different warranty terms, the vendors will help you get those fixed at the earliest than the anticipated time, please check with your vendor whether they can have this facility. 
• Few OEMs don't have on site support, for that the equipment or device may need to be carried out to nearest service centre to get that replace/repair, so please check service before you purchase and also ask your vendor, whether they can help you. Specially in India Apple don't have on site support unless they do have some corporate agreement. 
•  Presently most OEMs have a facility to lock the deal, So who ever is the authorised partner for that OEM will lock your deal with OEM and pricing. so that other partners may not get price, which will avoid competition among same product. In this case even the company will support vendor and client. 
• In few situations few goods will be imported from overseas in different manner where they will avoid taxes, which will help them to rate low prices, please check for that.