To answer your post, I think they have made misstake on their pricing.
I found some owners that have property in homeaway listing and they also contact me to promote their properties.
in 1 source have 2 different area to sell, firstly I didnt know that the owner actually put lower price than what he gave to me, so we put price as what it is and we get complain as its cheaper at homeaway than us.......
when we called them, they said it's a misstake that they put lower price in homeaway,,, well they finally changed the price on homeaway....
btw, I still dont understand why they do that and to be honest with you, I am not happy with what they offer to me.
I recently had one owner quote me a price by email for our specific requirements, and then when I tried to book it, quoted me a higher price. I didn't bother asking why. I booked elsewhere. Perhaps it was an honest mistake, but whether she was dishonest or deficient in ability, it pushed me to my next choice.
I have been renting 3-4 times per year for the past 12 years. This is the only time this happened. It is not common.