HP45 black ink cartridge: has been installed but no ink used. in SANDOWN VILLAGE, Victoria for sale

This is a genuine Hewlett Packard black ink cartridge. It's not a refill, it's not remanufactured - it's new! I purchased this HP45 in error. Unfortunately, I opened it, discarded the packaging and went on to install it in my HP psc750 which requires HP15; it will not accept HP45. The two cartridges look identical but aren't interchangeable, at least not in my printer. I’m told that certain HP printer models are flexible over this issue of ink cartridges. Anyway, my HP psc750 printer came up with an error message. As a result, no ink has been used. As the packaging was discarded, I can't check the due date. All I can say is I bought it in good faith about 2 years ago, reselling no warranty, no returns. I can't use so make me an offer. Pick up only; just give me a call to make a time.