Wanted old laptops possibly with serial ports

Looking for older Laptop's ! Dont recycle or throw away (Boston etc...) Help looking for older laptops that are complete and possibly run that you want to recycle or toss. I need older processor "CPU's" to communicate to special computers using serial ports built in the early 1990's. Today's new computers do not have serial ports which I need and need slower processors. They don't work at all with the systems I use. The computers are in a rugged and dirty environment and are used outside sometimes, basically they get ruined a lot by abuse. If you have any lying around that you are willing to give away, please get back to me. Thanks Intel 486 cpu or better if possible !