Basically that, it's really annoying you see a job you like, you apply, they really like your CV (yay!). You then get invited to interview and then you find they're offering a salary way below the market rate, and even with negotiation they won't come up to anywhere near what you need.
As most of the jobs I apply for are London based a face to face interview means either my DP has to take a day off work to look after the kids, or we have to pay for a child minder for 2 kids, as after the travel there and back and the interview its self it's about 6 hours out of my day.
If you ask, you get told they won't discuss it until interview as it's based on experience, it's so frustrating!