Well, if you could sell your OKW 2042 points for $75 per point, and your OKW 2057 points for $90 per point, you would lose $10 for each point that you extended at $25 and break even if you extended at $15. Not that great a deal to me.
I also don't think that OKW 2057 points will sell for any premium over SSR, and SSR doesn't usually sell anywhere near $90/point resale...