Well, where do you live? I can point you in the direction of Lowes.com, but I don't think they sell outside of the US. However, it might be a good idea to take a look anyway, there's a whole lot of information on there about different types of Fencing, vinyl and other kinds.
There are many home improvement stores in Edmonton and the surrounding areas that sell vinyl fencing. Some examples of these stores are Lowes or Home Depot.
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There are many decorating stores who sell vinyl windows. Find these stores online or browse through your local Yellow Pages. There are many choices for you to choose from.
You can get vinyl letters in a variety of places. You might be able to get them at some dollar stores which would be the cheapest place to get them. Staples may also carry them. Other than that you can always get them at letteringonthecheap.com.
There are multiple places where Canadians can buy vinyl wall stickers. Online, Amazon and eBay sell them. Retail stores that sell them include Walmart, Michaels, and Rafters. Stores that specialize in decor and wall treatments may also carry a selection.
You can purchase a privacy fence at The Home Depot and Lowe's. These two stores sell many fences for a relatively cheap price. The Home Depot offers their customers the opportunity to install the fence for them.
Bike shops and hardware stores sell rubber and vinyl repair kits that should work.
There are many stores that sell affordable flat panel wall mounts. The cheapest ones will probably be found at retailer stores such as WalMart. It is possible to find them online for cheap as well.
Decks turntables can be purchased at electronics stores that sell vinyl and turntables, as well as online on trading sites. Most hobby collectionist stores will carry them as well.
Amazon
There are many places that sell vinyl signs. You can go to Home Depot or Lowes as they both have vinyl lettering. You can also try Ebay or Amazon as well.
You can either find a music shop that specialises in vinyl or you can put it on eBay for ever how much you wish to sell it for.