I am looking for web-sites/stores similar to “tigerdirect” , “newegg” (both american) and such in Spain or in Europe general but shipping to Spain. For mail ordering mostly. Something large including popular items as well as more exotic computer parts, peripherals etc.

Another thing I want is tools and supplies. for electronic hobbyist work.

Two nice supplier i know are conetica.com and cablematic.com , you can PM if you need something that you can’t find there.

http://www.kelkoo.es/ would be a good place to start.  I buy from a store called CanalPC (http://www.canalpc.es) as I found their prices to be very competitive compared to the other Spanish online PC stores.  If you’re into overclocking PC’s, etc a cool website is http://www.coolmod.com/ assuming this is what you mean by “exotic” components.  However, before I discovered Spanish online PC stores, I had my brother buy the parts from Tiger Direct and have them mailed to me. 
For electronic components the one and only site I’ve found so far is http://ersonelectronica.com/index.php.
Hope this helps.

And there’s always good old eBay!  Most UK sellers will ship to Spain after a bit of negotiation…

Maya

... or spanish ebay too, cheaper shipping cost, and sure no need for adapters.