Greg (ABS Bricks…. I see what you did there…)
ABS = my wife’s initials, my REAL wife, they just happen to match the letters of my mistress’s initials: acrylonitrile butadiene styrene.
Bricklink is a time intense adventure. If you have plenty of spare time, go for it. If you are going to sell individual parts, (rather than sets,) you are more likely to attract buyers by selling large quantities slightly above the prices that people with small quantities have.