Bundy is attributed about 35 killings. I No of nothing would put him around 200.
I did my internship with a professor in U of L - he had a direct relationship with Bundy - spoke to him all the time. Professor Emeritus Ronald Holmes. Dr. Holmes taught for the Department of Justice Administration from 1975 until his retirement in 2003. I was fortunate to have worked with him for an entire year and then another internship with the Louisville Police, Crimes Against Children’ Unit. Dr, Holmes, who interviewed Bundy - Bundy would call his home - had a close relationship - stated it was above 200. I got to talk with Gacy and some other new minted serial killer during that time. Several rapists, etc... a very interesting internship in profiling serial murderers. Holmes has written several books if you are interested in this area.
https://www.amazon.com/Serial-Murder-Ronald-M-Holmes/dp/1412974429
https://www.amazon.com/Ronald-M-Holmes/e/B000AP7R74/ref=dp_byline_cont_pop_book_1