Your sites are totaly fine.
ID go for a more ligter design, as little profeshonal websitse use black backgrounds.
They have clear, simple, brand websites. I whould never(ever) purchase a computer from any of your sites.
1) It doesent look a proper company
2) Could be a skam site
3) No authitication logos
4) I see no use of secure urls Https://
and the main of all, your not a known, or recomended retailer.
Most small businesses start off, getting known by word of mouth, get some of your family, friends to visit the site. See if they want a computer, if it all goes well for them, they will go "Our @madkid@ sells computers. Ill get his info for you"
... then the recomendations go on and on..
My main suggestion:
Design: Move away frm the dark colors. Move to a minimal color, white background, black text.
Dont to the heading images. Do BOLD text.
Make a more Profeshional (aka boring) logo.
The whole top thing is pixalated, and does not look nice on large resolutions.
Aka.. Change from FUN ---> Borin
(although dont take my advice, if you think otherwise. I take Business and ICT corces.. Just trying to pass on advice from observation.. Do what you think is best)
Remember, the main attractions are the computers. Not the Design. Simplicity