An Australian One Dollar note (Knight/Stone - serial CPK-DGH), uncirculated and in absolute mint condition could fetch up to $14 AUD. If it has been circulated but still in good condition, it might fetch anything from $2 to $6 AUD.
300 mint condition notes with consecutive serial numbers would a similar value per note plus some for the rarity of the consecutive serial number.
A reputable coin dealer will be able to give a more accurate valuation.
There were no 1968 Australian Five Dollar notes printed.
There were no Australian Fifty Dollar notes printed in 1984.
There were no 2003 Australian Ten Dollar star notes issued.
There are no general-issue Australian $50 notes dated 2008 that have any value above their face value. There is a very small market for notes that are in perfect (UNC) condition, however that is rather limited at present. The only other notes that will fetch a premium over face value are those with unusual serial numbers such as 999999 - notes like this are scarce, but not particularly rare.
The last Australian One Dollar notes were printed in 1982.
There were no Australian banknotes of any type until 1913. The first Dollar notes were issued in February, 1966, at the conversion to decimal currency.
An uncirculated 1988 Australian Bicentennial Ten Dollar note depending on the serial number, could get anything up to $100 AUD. A consecutively numbered group would get significantly more. These notes were issued as a trial for the later release of polymer bank notes. The 1988 notes were not very good and tended to fall apart. They were withdrawn after a short time. A reputable coin dealer will be able to give a more accurate valuation.
Uncut notes are packaged and issued for a specific niche of the collector market. If what you have is genuine, you may have something of value. However, the last Australian One Dollar notes were issued in 1982, and there are no documented issues of uncut Australian One Dollar notes in any year. A reputable coin dealer will be able to assist with a positive identification and give a valuation.
You do not give any details of country, year or condition. If you refer to the Australian One Dollar note, which has been out of circulation for 25 years, and the notes are uncirculated and have consecutively numbered serial numbers, you probably have something of value. Take them to a reputable coin dealer for an accurate assessment and valuation.
There were no Commonwealth of Australia Fifty Dollar notes printed. "Commonwealth of" was dropped from all Australian bank notes after 1972. The first Australian Fifty Dollar note was issued in 1974.
An Australian One Dollar note (Johnston/Stone - Serial DGJ to DPS), uncirculated and in absolute mint condition could fetch anything up to $7 AUD. A group of 8 uncirculated consecutively numbered notes would be of great interest to many collectors, and is likely to attract a higher value as a set. A reputable coin dealer will be able to give a more accurate valuation.
There were no Australian 10 Shilling notes printed in 1966. 1966 is the year they were withdrawn after being replaced by the One Dollar note.