I was doing a job in a client's office today and they were doing an audit of their safe, pulling out all the cash and counting it. I happened to look over as someone was bending down to pull the stuff at the bottom out and noticed a pile of pink notes sticking out of a box. I asked if I could have a look and saw that it was part of a bundle and all the notes looked pretty new, so I used my hours-old iPhone to check the serial numbers on the RBA website. OMG. 2003, Last prefix. I didn't have any idea what they were worth, but last prefixes are always worth something. I asked the manager if he needed them and if not, if could I swap him for them. Yeah, sure, fine, whatever. I explained that I sometimes collect coins and notes if they're interesting and that a part bundle of unused fivers could be worth something. Yeah, sure, fine, whatever. $149 worth of stuff in my wallet later (I bought the guys coffee to say thanks, they thought I was weird and we had a laugh) and I finish my job with 28 uncirculated old $5 notes in perfect sequential order carefully tucked into an envelope. I just pulled out Rennicks to have a look and... $35 each ($980) if you were to buy them from a dealer. Despite the rest of the day being complete crap, I'm still a pretty happy chappy.