If you are going to be purchasing the lot just for an investment purpose, you should plan on keeping it for the long haul as I really don't think the prices will jump for a while. If it is an investment, think of the long haul, as property always has value to it.
It really depends on the location and the lot itself. There are lots in the area starting at $80k and others listed at $389,000 around the same size. To fairly answer your question it will depend on location, orientation, proximity to the amenities and golf course.
I just completed a transaction for an acre on the golf course for about $100k more than that. It is on the course, is level and has great views.
Suncadia is a great location with lots going on. If you need specific help, let me know and we can do some research on the property you have in mind and look at a few others which also may fit your needs. Best of luck with your looking.