"My Casio calculator I bought in 1985 is still working perfectly,"
My Texas "Programmer" hand-held calculator still works too on mains or with a 9v battery. Bought for £49 in 1978 (about £200 now with inflation) - when its recently introduced binary/octal/hex capabilities were very useful. Actually it was my second one - the first quickly developed the keyboard stutter that required Texas to replace a lot of units under warranty.
My great-nephew recently returned the remnants of my childhood Triang electric train set that I had passed on to his father when he was a child. After 60 years the diesel shunter still works.