looking for sourdough starter

Hi all I not sure if this is the right place but seeing this so far is the only forum I found so far LOL...I new here and something bad happen to my its missing I think someone threw it out...Ok I looking for a starter real old history I have been on the internet for over 4 hrs. looking I have not found any over 100 yrs old LOL that's not old...Why do people think that you need to buy starter the they would threw out any how...If someone ask me I would give them some...I would dry it out with flour or fresh  THANK YOU ALL FOR YOUR TIME