u/Lazy-Ice-7120

My dad gave me his old graphing calculators from high school and college. I want to get games on them but, they had to be the ti-83 and ti-85. How would I connect them both to my pc and where could I get my games, and for the ti-85 it’s not supported by Texas Instruments anymore so what cord should I use and what 3rd party website should I use? I want to keep this cheap, and buy from eBay, and these are not pluses or any special edition just the base models.