To Follow up on your note on Areas to Review, (we work in these areas a lot and I would say there are still bargains to be found, but I guess you need to be on the ground and talking to the estate agents/locals)
Ayora Valley. Alpera, Zarra, Almansa, Yelca, Jumilla.
There are still some bargains to be found around Aspa, Novelda, Monovar, Manan Valley, and going a little north to Biar, IBI, Tibi,
Then further north below valencia, look at Beniganim, Benilloba, Ontiyente, Alcudia, Montserrat, Real Montroi
In Murcia try Abanilla, Fortuna Pliego, Caravaca de la Cruz. Cehigen, Lorca.
Most of the above are rural areas with a growing expat population,
If you put into Google, some key words Like , Property for sale Ayora, etc, you hopefully will get some links to local agents
Things to put on your watch list(I am sure there are more) when looking for properties in rural Spain, are
New Builds ( Legality of Build, all planning and permissions in place, Put on post on the legal section and perhaps one of the lawyer types may publish a list of requirements which you can use during your searches)
Water, electricity and power availability, Not having water or Electric is not a problem, but you need to know that Electric (Off grid can be be relatively expensive to buy initially, but then cost very little to use/run. Having a water supply non mains can be very expensive compared to network water).
The life in the smaller towns and villages tends to be more relaxed than places like the urbo’s with making Spanish friends and faltering through the language on a daily basis talking with your neighbours/delivery men/ in the cafes etc is all a great part of the experience.
Good luck.