The comments made by 135 yearswaiting are true and I recognised the property from the link. Siegfried Borho started developing properties with a sea view and as the years went past and his clients grew older, access became a major hazard. He then abandonned the idea of developing on steep hills and developed Oliva Nova Beach & Golf Resort.
I should imagine that there is a glut of property on the market as when I was there in 2004 the market had already slowed considerably. Perhaps your interest alone caused the asking price to be adjusted upwards. A knee jerk reaction by an ever hopeful vendor and or agent in a buyers market.
I am pleased that you intend to go to the area and discover what it has to offer. If you can rent and avoid making a purchase just now my gut feeling is that some spectacular opportunities will present themselves over the next year or so. Once you know the area you can make a more informed decision.