Hi jj and

to CCF.
Your $5 note is well worth keeping and it's value is dependent upon several factors including the actual serial number and the colour of the serial number.
McDonalds 2012 edition identifies it's value varying dependant upon its condition and weather it has a medium to dark green serial or a pale green serial number.
It is a general prefixed note and ranges from $6 for a Fine through to $45 for an Uncirculated with a medium to dark green serial number. For a pale green serial its value ranges from $9 through to $110. The notes serial is a low number so this would also add to its value I reckon. It's a pity it isn't a last prefix in pale green (AB 19), it would be worth $2,650.
These values are an indication only and generally speaking are, in my opinion, overstated by around 10 to 20%. To get a rough idea what your note is worth you could try e-bay.
