I am partial to a little OK but being naturally frugal, I wait for the sales - I've bought the midi sling handbags for half price 2 years on the trot. I've also scored some lovely OK bedlinen from TKMaxx of all places earlier in the year.
It has a retro vibe but it's way prettier than most of the actual 70s stuff, and you would have been hardpressed to find patterned sheets in Egyptian cotton 40 years ago. Polyester yes. The handbags are really very nice.