Just an FYI, The
DVC Y isn’t what qualifies points as eligible for use for non DVC hotels, it’s the type of points one owns
To OP, points bought direct or resale prior to April 2012 can be used to reserve them.
However, if you do book, and then have to cancel, those points can no longer be used for DVC stays.
As already mentioned, point cost is much higher than a normal DVC room.