I had a similar issue a year ago. I won a bidding war on a vintage french rando frame, and the buyer emailed me and said he decided not to sell it. I was pissed, even posted on this forum, and most people recommended I just let it go. So it's time for me to pass that advice to you.
Oddly enough, about 6 months later the same exact frame was posted for sale over at the 650b Google group. It was for signficantly less than my original bid. I snapped it up, contemplated sticking my tongue out and taking a selfie after the frame arrived, but my better side got the best of me, for once.
Karma, baby!
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If someone tells you that you have enough bicycles and you don't need any more, stop talking to them. You don't need that kind of negativity in your life.