That's a favorite of mine, too -- just for the line you quoted alone. It really is a shame that Warner Brothers stopped releasing these in BD. Looney Tunes is one of their crowned jewels, IMO, and deserves to be available in high resolution.
I keep track of when, where and how much I paid for items in my collection using DVD Profiler. I pre-ordered each of these sets via Amazon. Here's what I paid:
Volume One - $36.89
Volume Two - $29.44
Volume Three - $34.49