Respectfully, The Frog is on point, in that no one is presenting that grace is cheap.(Grace is precious and valuable in that it cost Jesus His life.)
What does the scripture teach on this subject?
Eph 2:8 For by grace are ye saved through faith; and that not of yourselves:
it is the gift of God:
Eph 2:9 Not of works, lest any man should boast.
Eph 2:10 For we are his workmanship, created in Christ Jesus unto good works, which God hath before ordained that we should walk in them.
Those scriptures above teach: We're saved by God's grace through (the working of) faith. Not by "good works" or any action on our part. Grace is a FREE gift from God, so no man can claim any part of it.
Eph 2:10 explains that; Once saved by grace, God's plan ordains the believers to the ministry (works).