Here are 11 listings in the Palmer area. Of course, I did not do the normal parameter search of power, electric, road access, etc., because I do not know if this is important to you. Also, usually someone looking for this amount of land would look in the "Greater Palmer" area, and not just Palmer. Because I do not know what purpose you plan to put the land to, I did not extend the search outside of the acreage mins and maxes.
The link below will take you to the active properties in the Multiple Listing Service for our area.