Target, Wal-Mart, Lowes, Home Depot, Aces, Sears, and Big Lots are places you can buy metal shelving for cheap. I suggest Lowes, personally. They're very smart.
Chrome wire shelving can be found within most retailers home and organization departments. Amazon, Sears, and Target are some stores which sell this shelving.
Gondola Shelving is Commonly used is retail stores such as pharmacies, supermarkets and convenience stores. They are constructed of metal components and metal shelving, they most commonly used a peg board backing. More info can be found at http://www.mfried.com/gondola-shelving
You can purchase metal shelving from stores such as Home Depot or Home Hardware. If you do not have one of these stores in your area you can also find them at a Canadian Tire or Walmart.
You can install metal shelving yourself. When you purchase the shelving, the salesperson can give you step by step instructions. Lowes and Home Depot both sell the shelving and have great customer service.
Gondola Shelving is Commonly used is retail stores such as pharmacies, supermarkets and convenience stores. They are constructed of metal components and metal shelving, they most commonly used a peg board backing. More info can be found at http://www.mfried.com/gondola-shelving
I don't believe that a company can sell used shelving. However there are many second hand stores that could sell used shelving. some hardware stores have bulk sales or after a while the price will drop dramatically, I would contact you local store and ask.
There are a few really good brands of metal shelving. Black and Decker is a good brand and moderately priced and you can find it at most stores like Canadian Tire.
One can purchase greenhouse shelving from many different stores and retailers. Some examples that sell greenhouse shelving include Target, Living Outfitters, and Walmart.
Yes, there are several stores which sell decorative shelving online. My favorite places to find decorative items online are www.target.com and www.ikea.com.
Steel is a good shelving metal. It is strong, relatively lightweight, and durable.
There are many online shops selling shelving brackets which would be suitable to replace others. Hardware stores such as B&Q, Ikea and Leekes sell shelving brackets in the shop as well as online so someone can help you in the shop to pick the right size bracket. There are many online stores selling shelving brackets at reasonable prices such as Amazon, Rubbermaid and Drill Spot sell many varieties of brackets which will help with choosing the right size shelving bracket.
Metal shelving can be purchased from major retailers like Home Depot or Lowes. This shelving is generally very reliable.