The Vitamin Shoppe

• The Vitamin Shoppe is a chain commonly found in shopping malls and strip malls. This store carries Aura Cacia Eucalyptus Essential Oil, one of the best eucalyptus oils on the market. This product sells in-store in 2009 for $5.49 per 0.5-fluid-oz. bottle. The oil is also available on their website for $4.99, 50 cents off the retail price. If purchasing online, remember to account for a shipping cost of $4.99 for standard mail, or $15.99 for express overnight mail.
  
  

GNC Stores

• GNC stores are another commonly found vitamin store chain, located in many strip malls and shopping malls. They sell a brand called Now® Eucalyptus Oil, sold in a 1-oz. bottle at a cost of $5.99, or a 4-oz. for $9.99. This product is also available online, and if you are a GNC Gold Card Member, you get an additional 20 percent off, plus a promotional rate of "buy one, get one half-priced." Again, remember to consider shipping costs when purchasing from their website, which will cost approximately $4 to $6, depending on your location.
  
  

Vitacost.com

• Vitacost.com is a great option to consider when you're looking for a large quantity of eucalyptus oil. This store offers 100 percent pure, Nutraceutical Sciences Institute (NSI) Eucalyptus Oil. A 16-fluid-oz. bottle retails at $29.99, but is available on their website for only $15.99. Remember to include a standard $4.99 shipping cost anywhere in the United States.