G'day vinn,
The BGR site updates monthly averages (previous) around the middle of each month. The selenium price averaged US$95.17 in June.
Mar 07 - US$53.22
Apr 07 - US$74.56
May 07 - US$91.00
June 07 - US$95.17
(US-$/kg, in European warehouse)
http://tinyurl.com/yrswmc
Cheers,
xmagx