ezylman,
I paid $16 for each disc and the pvc was around $30 for both the 4 disc and 2 disc system together. 2 years ago I paid $128 for a 2 disc diffuser from a dealer online. It worked great for what I was looking for, but I'm a Do-It-Yourself kinda guy. As far as the labor goes to build it, maybe 2 hours. It's hard to gauge labor because I had fun doing it. For me it was worth it.
Bob
