Data Recovery problem

I deleted some files mistakenly & emptied the Trash. I don’t have backup available at present. Is there any chance of recovery of the deleted files? I am ready to buy software that can recover my files. Mac OS X 10.11 with 4 GB of RAM
 
That data has to be worth $$$ to continue down the recovery path.
  1. cease using the system
  2. extract the HD immediately
THEN and only with a 50/50 chance can a professional service have any chance to recover the files.
The issues is when deleted, the sectors where the data was located become available for immediate reuse, and thus may well be over written already.
 
Back