now you dont need to buy any comercial component for you joomla website
now you can get a comercial component for free,just register and download.fell free pal,and enjoy
this is the list of free download...
1.iJoomla Magazine
2Fireboard v1.0
3.joomla fornpage slide show from joomlaworks.gr
4.jomcomment from azrul
5.joomla affiliate nore smart
6.ijoomla ad agency
7.ijoomla_rss
8.YOO.Carousel.for.Joomla
9.YOO.Slider.for.Joomla
10.SEF.Advance.v4.1.3
11.meta generator
12.joomla template maker

and many more...

you can visit here

http://www.freetutorialportal.com
or
http://www.freetutorialportal.com/free-download