Autozone rent-a-tool policy

i went to rent the harmonic ballancer puller from Autozine tonight, and they only charged me $15 deposit. i find this interesting because this is the SAME one we used on my friends car about a month ago and he had to fork up $50. the guy at Autozone said if i dont wanna bring it back, it has a 90 day warrantee. so basically, i hope i would never have to use this thing again, but it seems like its something thats good to have, and for $15, y not? my question is, if i dont take it back, will they call me a million times before they figure out i decided to keep it and if i keep it, will they never let me rent anything there again?

Call them and tell them you want to keep it.

nope, i have tools from them that ive had for almost a year, never heard from em