It looks like 1509 Regimental was withdrawn on March 30. (see link to MLS listing). There are a variety of reasons an owner may want to withdraw their property, so it does not necessarily mean it is no longer for sale. (after all, everything is for sale, right?)
Let me know if you'd like me to find out more about the status of this property for you, or if I can search other similar properties.
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Thanks, and Happy Memorial Day!