I got a biro used by Hendrix for sale here. The nib broke and in 1969 he sent it to my dad for repairs (he was in the biro maintenance business at the time). The replacement nib was installed, but unfortunately Hendrix was waylaid having to arrange for one of his guitars to be shipped back to New York after a string malfunction and never collected. This may be the last biro that he ever used (it is a right handed pen, but I believe Hendrix just used it the other way round).
Bidding starts at $100,000, so PM me an offer. Certificate of authenticity using the great man's own biro provided to the lucky recipient.