Whare can i order a 100x microscope

i need it to check tricomes so i know just when to harvest but with so many sites selling them i dont want to get ripped off so if you can recommend a good site that would be cool......Thanks

http://www.radioshack.com/search/index.jsp?kwCatId=&kw=microscope&origkw=microscope&sr=1 3rd one one down 10 $

yeah get the one from radioshack works perfect and its only like 10 bucks