These sites offer free or very inexpensive vector graphics and Icons. Other sites have very expensive prices for vectors. In this day and time web designers and developers have to choose their resources carefully. You really must try these sites. Please be sure to read the terms of use for all fo the sites. Some of the sites that offer free vectors require a link back...but not all of them do.

• Vectorstock - (vector images for 1 credit)
• Bazaar Designs
• 123 Free Vectors
• Q Vectors
• Open Graphics Design
• Vecteezy
• Vector 4 Free
• Vector Junky
• Vector Tuts Plus
  
• Vector
• Vectorious
• Web Design Hot
• Icons Pedia
• Icon Archive
• For Designer
• Free Vectors
• Vectorain

I will add more links as time allows.