If its what you really want, and it is real (always a big if), bid your best price and sit back. If you lose it, even though it may take some time, another one always seems to become available. This could be the old supply and demand process. When an owner sees a recent sale at an attractive price, it can incent* that owner to put one up for sale at a previously unthought of price.
*Incent was always the proper word until some genius decided that incentivize was more correct.