Price is not bad for PS, I thought it was more than that last time I looked
Depends when you looked... their "photographer bundle" is a reasonably new thing (introduced about 3-4 months ago) .... so you may well have looked before that and seen the prices for the full suite instead ?
From what I can tell, Macphun looks more like the Google Nik plugin for Photoshop rather than being a broader photography tool like Photoshop, Lightroom, Aperture etc. ?
Guess it depends what you're after....