What is the value of a 1997 Liberty one cent piece?
A 1997 US one cent piece? is a Lincoln cent and only face value.
It depends on the date, condition and the type. There were two main styles of three cent pieces, there was the 3 cent silver which was tiny and the 3 cent nickel which was large (the 3 cent silver had a star on the obverse, the 3 cent nickel had a head of Liberty on the obverse). Without knowing the date or at least the type, it is impossible to answer your question.
You really need to be a lot more specific. There is no such thing as a "liberty" 50 cent piece, rather, there are various types of 50 cent pieces featuring a personification of liberty such as the Walking Liberty, Barber, Seated Liberty, Capped Bust, Draped Bust, etc. You need to post a date and an estimate of condition.