You probably aren't still looking, but this US deal will probably suit your needs
$30 US for the Lumia 640. Think this phone is on clearance in the US. If you are planning on travelling or know someone down there who can grab it for you.
Can get it at BestBuy
http://www.bestbuy.com/site/at-t-gop...&skuId=9231014
or Walmart
http://www.walmart.com/ip/AT-T-Nokia...Black/44465708