Hello,
Have you tried visiting a local thrift shop, such as those operated by
Goodwill,
March of Dimes or other non-profits? Often non-working or semi-working (damaged) laptops can be found at their stores inexpensively. While they may not be useful for "modern" operating systems and applications, they just might be what you need for an art project.
Regards,
Aryeh Goretsky