Just got off the phone with OmniTracs. The MCP100 is discontinued. The MCP50 is the currently suggested unit. It is $799 to purchase and $31.95 per month unlimited usage on a 1 year contract down to $27.95 per month unlimited usage on a 5 year contract. He says it should communicate fine with any carrier that currently communicates with the other units. I can provide contact info if anyone is serious about getting their own instead of using the company unit.