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Would you buy that property today at today's price? If not, then it's time to sell.

Another helpful question is... Which situation would you find more painful: you decided to sell to bank profits but the property went up in value and you missed out on more profit, or you decided to hold and the property went down in value, and you missed out on an opportunity to realise a significant gain?

The answer I was hoping for :)
A profit is a profit, can't be too greedy and get burned. I'm putting my house on the market hopefully this week or the next and hope to get 80-90% gain.

Sounds like a great time to sell to me :)