Southwest does offer the ability to buy A-List qualifying points, but those offers are targeted (sent only to some members) and non-transferable, and the offer doesn't apply to earning Preferred status. Double check your email (and spam folders) but if you haven't received an offer you're likely out of luck. Also, be aware that the cost of these points can be very high, especially for 9,000 points, and is not offset by the points value, as these specific points aren't actually redeemable towards flights (or otherwise).
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