What’s your biggest domain sale ever — and how much did you originally pay for it?

I’m curious to hear from people who have actually bought and sold domain names.
What’s the highest price you’ve ever sold a domain for?
If you’re comfortable sharing:
What was the domain? (or at least the category/niche)
How much did you originally pay for it?
How long did you own it before selling?
Was the buyer inbound, or did you approach them?
Where did the sale happen — Afternic, Sedo, GoDaddy, direct, etc.?
Did you expect it to sell for that much?
And for anyone who hasn’t had a big sale yet: what’s the highest offer you’ve ever received for a domain that you didn’t accept?
Would love to hear some real stories — especially the unexpected ones.