Try this search on eBay. Skip the ones that are WorldMark and the ones that don't list the number of points they come with; the latter could be just weeks that are at a Wyndham-managed resort and are not converted to Wyndham points.
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Compare the different resorts based on the maintenance fees, consulting the link below for reference. Differences could be due to being converted weeks.
Form Responses 1 Timestamp,Untitled Question
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As noted by
@Ty1on, program fees on resale points would be $0.64/K with a minimum of $165 annually (2021 numbers). For developer points it would be $0.66/K with a minimum of $185. If you have mixed points in an account, you pay the $0.66/K.
One other item you don't seem to be taking into account is the exchange fees for the SA timeshares.