GEO sample file, simple

This format is very simple and includes two columns: one for feature id (e.g. gene name) and one for the expression value.
^SAMPLE = GSM21610
!sample_table_begin
ID_REF   VALUE
id1	     105.8
id2	     32
id3      50.4
id4      57.8
id5	     2914.1
!sample_table_end
Download the sample file here:
http://www.resources.qiagenbioinformatics.com/madata/GEOSampleFileSimple.txt