Preserving Christian Publications is having a very short-term sale on this set: $100 for all three volumes. They usually seem to be going for $65 a piece so this appears to be a pretty good deal. Here's the web page:
The sale is over Wednesday 9 June so this is very short notice. . . .but I only got the notice myself this morning.
I just thought this might be of interest to some here; I have no stake in PCP books. (Except that, as of this morning, they have my $100.)