Michele,
We were in a similar position.

We eventually (after 5 weeks of nonsense from estate agents) decided last Friday to put our house back on the market. Last night we got a full asking price offer from a couple who don't have a chain and we have accepted.
Hopefully we can all get excited again about our trip to OZ.:)
The house sale was more stressful than the visa application!! (imo). Hang in there and good luck to everyone else.