#1
Yeah so will putting a new nut and bridge on my jazz bass fix the buzzing and dead notes and sh*t? now the only way to keep it from doing that is to raise the bridge up to space needle heights. oh and open notes make a faint buzzing noise.

oh p.s. it got that way because some d*ckhead on ebay decided not to tell me about the problems.
#2
have you checked the bend of the neck and adjusted the neck properly? If you are getting buzz and dead spots despite high saddles this may be part of the problem. Check the bass faq for info.

If the seller has misrepresented the item (that is the neck is actually warped and cannot be adjusted properly) you can certainly make a claim to ebay.