I researched it further than I thought I could, tbh, without a catalog or any paper resource on the country. The tear makes it poor condition, most likely worth from $5-20. To me, it is like a old car with low miles- worth more than the blue book price. This is a decent example of early stamp history; the oldest stamp I have as well! Can only hope to be as lucky with other stamps in the kiloware!
If anyone from Australia or more knowledgable on the early Victoria stamps wants to add in, please do so.
