cpap and bpap machines

i have one near brand new, cpap, and one very old. the bpap is old and the cpap is nearly new. both come with new hoses and face masks. the cpap is $399 and bpap is 75. the cpap has only been used for a few days when I discovered it was the wrong type of machine but i kept it as back up. the bpap works fine and has many adjustments for time delay and pressure. bpap is a RESPONICS and the cpap is a resmed.