(verbatim from uncle RKP, baptized in 1992 in Indiana, USA)
What I remember the best from my baptism is the talk that my Grandpa gave about the Holy Ghost. He held up a sign that said something like, "The gift of the Holy Ghost - $1,000", and he emphasized the fact that the Holy Ghost cannot be purchased and is priceless.
We have to be baptized and worthy and then we can have the priceless gift of the Holy Ghost.