Worth it if and.only if you need that stat combo for an important toon and you can afford to drop 5 mill on a mod which may never go higher than 5 speed.
I've dropped the 5M for a speed arrow, but a speed secondary isn't worth the gamble imo. Too much chance it'll slice to gold and still only have 5 speed.
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Whoops sorry forgot to attach
Have patience and you'll be better off.