From my own 6-month long search, I found that finding a singles setup under $200 is difficult. I had a few offers in the $175-$190 range for the HOG 32#. A backplate will run $50 at the low end and putting a harness together yourself will push $30 once you include shipping. I got my singles setup (36#+SSBP+STA) for $250 (+sh) and my doubles (45#+ALBP) for about $150 (+sh).
That said, I'm very happy I got a BP/W. It's been worth the money, and it's the only thing I own that was over $100 (incl reg, computer, wetsuit, twinset, etc).