I have one from hostineuro with 512mb ram. For 10euro hosted in Netherlands.
Working fine for last 3 months.
I use Hawk Host and its the best host currently around. Every plan of theirs is priced at a very low rate, i also suggest you obtain coupon codes from webhostingtalk.
Follow me on Twitter: @hendricius
I believe that it's better to pay some more but receive quality and stable VPS
They have nice feedbacks on the web