The Intel 4004, naturally, is one of world's most sought-after collectable/antique chips. Of highest value are 4004's that are gold and white, with visible so called 'grey traces' on the white portion (the original package type). [[As of 2004]], such chips reached around US$400 each on [[eBay]]. The slightly less valuable white and gold chips without grey traces typically reach $200 to $300. Those chips without a 'date code' underneath are earlier versions, and therefore worth slightly more. Other valuable chips include the [[Intel 4040]].
