Funnily enough, our daughter experienced the exact same situation, where the vendors dragged on and on. In her case the vendors, who have emigrated to the US, simply did not understand the extent of the problems in the housing market here, (they are left Ireland 4 or 5 years, and they had the property rented out).
In this particular case, the Bank played a major role in the delay, where the vendor's solicitors kept our solicitors completely up to speed. Each time they sent over the required amount to clear the mortgage, the Bank wanted more due to another day and another day of delays etc. Fact was the sale price was below the mortgage amount. When our daughter dug her heels in and told them that if they didn't complete, she would have to rent another property and no matter what was to happen in price increases etc they would have to sell the property to her and she would deduct he rental costs and storage costs off the price. So they came up with the money and completion took place after a long, very long delay.
Not particularly nice people but they came up to the mark. Completion happened and daughter now in new home.
In reality the state of the Irish housing market and lack of willingness on the Bank's side to deal with problems, remains a very clear realism as to why many many emigrants will never ever set foot back to the home turf. They'll come home for the crack but never again for the hassle of dealing with the Irish Banks.
As witness to the fate of others, it really is not that easy out there. Again I say and firmly believe it true, the collapse of Ireland and its people, was created and caused in total 100% by the Financial Institutions, not the Politicians.