According to The Huffington Post, Marquez posted the Craigslist ad posing as the infant's parent.
The ad was titled "Baby for Sale" (along with a photo of the child) and said the baby loved to play and have fun, but had asthma and was "really getting on my nerves." It also read, "I don't want her. Please email me."
When he received a response to the ad, Marquez provided the interested party with his girlfriend's phone number, which immediately prompted her to inform police.
The 23-year-old Latino has been charged with endangering the life of a minor, harrassment and his bail has been set to $1,000. The person who responded to the ad and attempted to make the purchase is also currently under investigation.