The Pretty Woman star's wife Carey Lowell made him get rid of the bulk of his instruments, including blues great Albert King's 1958 V classic and an axe once owned by reggae great Peter Tosh, and he admits he still has pangs of guilt about parting with the guitars, vintage amps and accessories.
Gere says, "It was a really great collection of stuff. It was very painful (but) I kept 25 guitars... (and) now I'm done. I don't know how I ended up with all the guitars. I never thought it was a collection. It was just my guitars.
"I never saw the guitars together and when I was selling them at Christie's (auction house) they had them all polished and lined up there... and it was so beautiful... I want them all back."
But the sale was vital for charities Gere supports: "You can build a hospital for that... It was amazing."
The 2011 auction raised more than $900,000 (£562,500) for charity.