For the above sum(plus the necessary equipment) I can get you free voip phone service.You just need to get a google voice number and a pbxes account.(http://www.pbxes.org) You can have up to 2000 minutes.Plus 5 extensions. Perfect for a small business. Great 2nd phone for a fax or business. For a little more you can get more minutes from a voip company.
What you need:
Google voice account
voip router or ata adapter or voip phones