I sold a french keyword .biz for 1K. Tried to buy back for the same price after one or two years, offer not accepted.
Sold a 2 two word handreg .info for 200, domain dropped, I bought it again, and I also dropped it eventually.
Handregged a two word .info, offered 800, not accepted. Dropped after 10 years. New owner also dropped it, and I didn't buy it back (as far as I remember).