Well, you'll miss out on the fun of the actual collecting & hunting of your loose collection.
It took me approx 1 year to get everything complete. (still missing trapjaw's ring & hook though)
Pricewise, i'd also pass. The first three waves do not include many rare/uncommon figures, except for Faker & a complete Trapjaw. Other figures like Buzz-Off, Kobra Khan, Moss Man, Clawful, Fisto can be easily scored for a few bucks each.
I'dd pass if I were you...