Sorry for the late response, but I don't hang around here as much as I should anymore.
But to answer your question, I always under promise, and over deliver.
My rates may be relatively cheap for the overall industry, but by no means am I lowballing.
I start at $75/hr, one hour minimum and the clock starts the minute I get in my car.
I include an estimate for post process time also, as nobody likes surprise costs.
It comes out to around $75-$100 for each photo and each minute of processed video, and that's a local job with minimum travel costs.
But, as usual, you always take dozens of photos to get a few good ones, all at 5 layer bracketing, so I'll just throw in a couple of freebies of shots that I like, cuz once you start processing, it's hard to stop and you end up with lots of good pics.
Prices will rise with the cost of the property also, as the last property in the million dollar range costed them $600 for 3 good pics and one minute video.
Of course it's very difficult to show your skills with that kind of restraint, so they got a little more material than asked for, and that's the over deliver part I mentioned, and people just love free stuff.
Matter of fact, that's a great way to get your foot in the door is to send them one or two good free pics that they can use.
If they're impressed, you'll hear from them again.
Whatever you do, DO NOT BE THIS GUY -->
This is painful to watch. It's jerky, too high, no revealing or cinamatography techniques, no colors or processing, I can actually see the "pilot" standing in the street.
Try to be more like this guy:
Revealing shots, showing the flavor of the area, some cinematography techniques, etc.....oh yeah, this is mine too, and I always hate every single one of them and strive to do better. Don't ask why they don't want music, I don't know, it would add so much more at very little extra expense.