I suspect Saturday 8 March may be your problem. I suspect that there is something on in Sydney that night as a lot of the hotels (including 4* marriott) are showing no availability on one of the Australian sites where they tend to dump their excess capacity. (Although having said that I live in Sydney and dont know what it is). I have been a regular bidder for sydney rooms (both 4* and 5*) and have never got anything other than the marriott. Nor have I read of anyone getting anything but the two marriotts. I've just checked the marriott site and the 8th has no availability for either the 4* or 5* city hotels - just the one out at North Ryde (which is some 20+ mins drive out of the city in the suburbs). So I think you will need to either consider moving hotels mid stay - or paying for another hotel (outside of priceline). At any rate the saturday night wont be cheap. I've stayed in a fair number of the Sydney hotels, and am happy to give pointers re specifcs or relative merits of general locations or otherwise.