I looking for 250cc motocykle cross, where i can buy it and how much must pay

Hi firends i looking for motocykle. I research aliexpress and i find a nice motorcycle its name CQR250 cc or its only engine name? But i dont know why sotetime it cost abou 200-300$ but at some auctions it cost 1000$. Why the price one time low one time huge?

Where i can buy motorcykle with shipmens to Poland for 300-400$? it is possible or not?

I riding on Super Tenere a 5 years but now i would like to test me at cross its be nice if chine motorcycle give me plesure at one year.

thanks for answer!

Czesc i czolem ;)
Im from poland too but will reply in English as this is an English speaking forum.
Theres loads of different CQRs, the price varies due to different configurations. Different engines, suspension, wheels etc.
I wouldnt recommend buying one. You live in Europe man! buy second hand japanese and it will be wayyyy better than the CQR, even 10 year old. I wont even mention the availability of parts for the CQR in Poland....and Im sure you will need them