Some systems have boatloads of data, others not so much. Sometimes it's easy (just one or two .dat files, with a logical structure you can just have dumped into excel, and do with them as you will.) others have hundreds of tables, and really complicated internal structures and stoopid table and field names., those take a little longer.

If you have a need to repeat the extract, I can probably produce an extractor program for a minimal amount of $$$ including runtime.