vintage fender stratocasters

I was wondering the value of some brochures vintage music, amp covers, picks, guitar strings and more.?
My grandfather had a music business and I found all size boxes of vintage Sunn amp covers all types of guitar picks a lot of decisions. Some Martin too. I have brochures on Stratocaster, Fender Mustang and Fender amplifiers. In addition, instructions on how to solve all sorts of different vintage guitars, amplifiers and more. Cases of non-use vinatge guitar strings and some vintage tuners. Almost everything is in the original boxes and are in good condition. Some excellent. I there might be some parts of time and also fret boards. Is there any way to know if these things are worth a lot of collectors?
I guess they have some value. Vintage guitar parts must have some value and I am sure there are people out there who collect brochures and literature. Check eBay and see if there completed auctions for some of the items you have.
Fender American Vintage ’62 Stratocaster