Although I bought my WM points resale, the guy I bought from must have purchased direct because WM treated my purchase like it was a relative purchase or something like that. For a month of so, I had full access to travelshare, which wasn't great, but for the RCI points access. I ended-up calling WM about the mistake or I might still have that benefit, today.
At any rate, before I knew I couldn't book the Wyndham properties, I got put on a waitlist and was eventually matched with the Myrtle Beach Wyndam, Ocean Boulevard. Only last summer, a one week stay in a two bedroom was 10k points. This year, it's more like 22k, points. Might be a little less, but the point value went through the roof, for no reason. Lucky for me I got an Ocean Boulevard through RCI for last summer with my WM points. Had to pay the exchange fee, which is not cheap, but it only cost me 10k WM credits.
So, using WM credits for Wyndham resorts, although possible for some people, has to be one of the worst values for your points. Much better off going through RCI for those exchanges.
Resale credits purchased prior to 11/05/2006 are considered WM+A. Resale credits after that date will be identified as WM (unless sold between relatives).
For the vast majority of owners, it doesn't make a difference. But Wyndham Sales uses that fact to create doubt, and then convince owners that their "old" credits are not as good as the "bright shiny" credits Wyndham has for sale.
I have owned since 1999 and have never yet reserved a night at one of the Wyndham resorts through WorldMark.
The prices for the very few Wyndham resorts that we had access to used to be reasonable. Now, the prices at many of the Wyndham resorts are quite high as compared to a standard WorldMark resort.