$10/month/512M/25G space/500G traffic/XEN VPS —— LoveVPS

LoveVPS was founded in February 2011 and provides Xen VPS, KVM VPS and dedicated servers. Its US host is located in the hostdime data center, and it also has servers in the UK. Relatively speaking, LoveVPS's VPS is moderately priced, and its stability has not been tested yet.
The following is the configuration of 512M:

Memory: 512M, Space: 25G, Traffic: 500G, IP: 1, Price: $10/month

LoveVPS claims that it does not oversell !
Test IP and files:

USA:
Ping/Traceroute Test: 72.29.87.105
Download Test: 128MB Test File
U.K:
Test IP: 109.73.162.240
128MB Test File: Download

LoveVPS official website: http://www.lovevps.com/