Hi James,

Thank you for contacting Mearto with your appraisal inquiry.
Is the photo of the back the same stamp? The edges look quite crisp whereas the images of the front of the stamp show degraded edges.
The highest value for this stamp is about $13,500, set in 2013 for a mint example; I can find several very good examples selling online for about $50. The poor condition of the edges of your stamp keep the value fairly low
Based on the photos and information provided, and subject to examination, this is:

An Australian 1909-1910 Rose & Yellow Green 2D Postage Due stamp
cancelled
1 by 7/8 inches
CONDITION: cancelled, degraded edges, ungraded
$15-20*
*represents a fair-market value for auction purposes; retail or asking price may vary.

Please let us know if you have additional items to appraise, and thank you again for using Mearto.