The prints I am offering for sale here are made on my Epson 2200P printer with their new Ultrachrome ink set, printed on Hahnemule art rag paper. Epson and Kaiser labs estimate that the Ultrachrome inks should have a lifespan of over 100 years. The Hahnemule paper is coated acid-free archival paper and should last for over 100 years, as well.
Unless something goes horribly wrong, your print should last longer than you will. More importantly, it will probably last longer than I will. If I am dead, I assure you I won't care if your print starts to fade.