I have done over 50 bonus buys (fun money mode) on three hacksaw gaming slots, Chaos Crew, The Bowery Boys, Wanted Dead or a Wild
and I have yet to get a return that is equal or better... Chaos Crew bonus buy costs 129x, The Bowery Boys bonus buys cost (80x, 200x, 300x), and Wanted Dead or a Wild bonus buys cost 80x, 200x, 400x....
but then when I try bonus buy on Infectious 5 by No Limit, paying for the 555x bonus I have had returns of over 1500x without trouble.
one of the worst returns was just 0.7x on a 200x bonus buy with the Bowery Boys slot.... this was then followed by a 4.6x on the 200x bonus buy.
as I type this I just did a 400x bonus buy on Wanted Dead or a Wild and the return was just 21x