The heaven of the photography

Photography is a expensive hobby, and if you like, Korea is the heaven.

I check several shops and web sites and all about photography (lens, memory cards, batteries...) is so so cheap. I mean cheap when you have -50% less of the same product price!! Amazing!

Two weeks ago I bought a new lens: Sigma 10-20mm f4-5.6
(the picture on the left I made it with this lent, you can see the best resolution on my Flickr account)

Now I'm looking for a Canon Extender 2x II or/and a Sigma 70-200mm f2.8 APO, EX, DG, Macro, HSM (I would like the Canon 70-200mm but... my budget is restricted)

The price in Barcelona of the Sigma 70-200mm is around 750€ but here in Korea is 720.000W (427€ nowadays) Interesting, isn't it?

Right now I've this ones: Sigma 10-20mm f4-5.6; Sigma 17-70mm f2.8-4.5; Tamron 70-300mm 4-5.6 (this one I'll sell because I don't like it)

So my question for my readers is... do you recommend me this lens that I'm on mind? Thank you!