Outdoor halloween decorations can be purchased in you home town. Places such as Walmart and target offer great halloween decorations for all sorts of decoration ideas.
Most stores will have Halloween decorations on sale but usually just before and just after Halloween. Stores such as Walmart and Target will offer discounts not tied to sales.
There are many places to look when purchasing outdoor halloween decorations. There are local halloween specialty stores, wal mart, target, hobby lobby, joann, michaels, and many more.
Spirithalloween.com/decorations has an amazing selection of Halloween decorations. Walmart, Costco, Target, CVS and K Mart also have a variety of Halloween decorations to choose from. Halloween Spirit is another good place to shop.
Sometimes people use Christmas outdoor lighted decorations for Halloween because they are versatile, like the white lights. However, it is quite tacky to use decorations like reindeer/Santas so I advise against that.
You can usually buy them at places that sell Halloween decorations and Halloween party decorations and party favours at around halloween. I have a purple topped one with a spider on it that I got at Walmart.
Party City has great Halloween decorations at a killer price, also you can go to you nearest Halloween store and buy some as well. You do not have to buy them online.
spirithalloween.com is the one stop shop where one can find cheap Halloween decorations. If it wasn't for this site most people will become broke for buying Halloween decorations.
For great and spooky Halloween decorations, your best bet would be go to a store specializing in party decorations, such as the store Party City and Halloween Express.
There are many sites to give you cheap ideas. Some of them are www.halloween-website.com/decorating.html and www.bhg.com/halloween/outdoor-decorations/
The most popular decorations this year would defenitly be outdoor hanging spiderwebs made from cotton.
You can buy halloween costumes and decorations at WalMart. WalMart is a store that sells many items online. You can purchase costumes and decorations from WalMart and they will have it delivered to the store for free or to your home for a nominal cost.
A great place to buy decorations is at a Party Tree or Party City. From experience, when Halloween rolls around, everyone gets the best decorations from Party Tree and Party City.