In view of SAP’s sales world-wide, I do not believe it is a dying market for SAP. This applies to HR also. As for job opportunities is concerned, you would of course know that it depends on various factors, how your profile and needs match with a given job’s needs.
You can try alternatives like – widen the scope of your search, widen you skills, or the geographic area of your search, so on.
As for widening skills, you may look at – BW, Fi/CO, Technical areas, to name a few. This of course depends on your interests.
You may also use the lean periods to increase your knowledge. You may know that US used the period of depression some years ago, to improve their transport infrastructure; this has paid off very well.
Quite often job search through networking is more effective than through job agencies.
Hope and wiish you would be able to find one soon.