Suggest me the cheapest possible VPS in USA ( LA + NY + Chicago )

Hi, these are my requirements will appreciate your suggestions:

1) OpenVPN for personal use so Tun/TAP should be enabled
2) 64-512 MB RAM whichever reduces the cost the most
3) 10-50 GB BW whichever reduces the cost the most
3) IPv4 addon to add additional IPs when required at rate $1-$2 maximum
4) OpenVZ
5) Looking to spend $2-$4 / month maximum

So what are my cheapest options? I'm open to offers if any host is willing to make me a custom package let me know.

Thanks in advance!