I have rented my points many times and I even have repeat customers

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First of all ... I'm sorry you couldn't use your points

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Secondly, it's only been 2 weeks and you had some nibbles. What did you expect? An instant sale? Also, you were originally trying to sell an existing reservation which is always harder than just points. Give it time!
Third, you need to make your "ad" a bit nicer. Yes, you have certain terms of sale (50% down, $10 per point firm), but there is no reason to put them in your post. Stick to the minimum: resort, number of points, cost per point, use year and put that all in your Subject. Anything else may scare a buyer away and you can always tell them your terms of sale once you have a relationship with them .
Fourth, think about renting less than the 200 points. Maybe a couple of studios to a couple of different people? I know that you need to get rid of 200 points, but you may not have a buyer for all 200 in your preferred timeframe.
Fifth, contact people who are looking for points. Call MS for them and let them know if their request is available. Make the contact and create the relationship. The buyer will thank you and you will get the sale.
Good luck! You have a long time to sell your points. I think you'll be fine

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