Reverting to the Victoria for a moment,
Gibbons lists the 1d green as existing printed recess (intaglio) at £28 used and typo (letterpress) at £18 (and printed both sides at £1700. Worth flipping it over - you never do know

)
The 2d lilac (and various other shades) is a minimum catalogue value item ... unless it has the watermark sideways, in which case it's £85
The 6d grey ranges between £7 and £10, depending on watermark and perf gauge. The barred numeral cancel 73 seems to be of Sandridge, these days known as Port Melbourne (and despite appearances, quite a desirable address!)
The last 3d blue is probably £7, if it has a watermark of the words THREE PENCE (there is also a watermark error TRREE for THREE, £550), or unpriced if it has no watermark.
Of course, all these prices would be affected by condition.