Can I purchase the item from any branch since I have a quotation from one of your stores?

It is a possibility depending on what items you have taken a quotation for, and the availability of stock. Generally, prices differ by region and for some items including but not limited to cement, blocks, steel, timber and roofing iron, may differ from one branch to another. Its best to check this with Customer Care team or branch you intend to purchase this from to avoid any inconveniences.