mate, if you can get the 1909 1/2d, you will be the first one who own that unique coin (i think you wrote the year wrong). Apart from that, only 1920 1d is worth to looking at it, see where is the dot.
All depends on grade. I would offer $20. If any of the KGV pennies are in EF or better you have made your money back with one coin plus some. If not then on eBay you would be ble to get $20 easily as a lot or individually.
If any of them are higher grades I will buy them from you if you dont want to keep them for your collection.