2007 Mazda B3000 Truck $5000 OBO

2007 Mazda B3000 Dual Sport V6 w/ around 180000 miles. Has been sitting for a while and the battery is dead so I can’t check the odometer. Last time I drove it there is a check engine light for an O2 sensor and the OD light flashes for an issue with the transmission torque limiter. When I took it to the dealer they said just to drive it till it fails and then replace it. They couldn’t give an estimate on when it would fail. It still drives fine but I just want to be upfront. Would be a good little farm or work truck for somebody. And it’s pretty much a Ford ranger so it’s easy to work on.