Hi
We don't allow speculation about property prices on askaboutmoney, so I have removed this from y our post
The main issue here is that if you sell now, you will have certainty.
If you have a cheap tracker, in theory, the lender should be prepared to give you something extra for paying off part of it early. PTSB are doing this already and maybe the others will follow. So you could wait hoping to take advantage of this.
However, it's very difficult to sell apartments at the moment, so if you have a buyer, my instinct would be to take it. If your lender introduces a discount scheme later, you may have saved some cash to take advantage of it.
Brendan