My wife of 43 yrs has been fighting cancer for nine years with the prayers of people across the nation God has kept her alive for me she is terminal,inoperable, and incurable she was diagnost with this last bout of bone cancer, she has a tumor behind one of her lungs and we had to put her on full time oxygen, we have need of a portable concentrator if someone out there has one that they would sell resonable please let us know, thanks so much and remember prayer and the will to live will move mountains thanks again Wild Bill