I am from serbia, but i have connections in bern, and i want to buy i used bike, and then the my connection will send it to me.
My height is 187cm and weight is 90kg, i want full xt equipment (derailleur rear and front, shifters, brakes disk or v-brake, crankset, bb-set)
Budget is 400 euros
And 2006 year old or newer
Sorry for my bad english

I forgot i want xc hardtail bike, only front suspension (fork)

Does anyone know the answer

You can find good used and cheaper new bikes at the Sport Bourse, Niederwangen.
Repairs are done by Drahtesel Velorecycling-Werkstatt

Waldeggstrasse 27
3097 Liebefeld

031 979 70 70‎
031 979 70 79‎ - Fax

Are they have a website

No, Drahtesel is a low cost operation for people out of work. They repair and sell bikes that the police have found, so there are sometimes really good ones. Tel. 031 979 7070. They have people who speak many languages. Location is http://yellow.local.ch/en/d/Liebefel...what=werkstatt
The Borse has a web site http://www.sportboerse.ch/. Location http://yellow.local.ch/en/d/Niederwa...WQ?flyout=true
They organise a bike sale next on Sunday 30 August from 10 to 15 hours, I think it is at the Inotex, the Zentralwascherei in Weyermannshaus

Also http://www.ski-velo-center.ch is next to the Boerse in Niederwangen.

Also see Buying a used bike in Bern