The ones in front are original(volvo). There is a little give to the rubber but no cracks, nor any other signs of extreme wear. Im wondering if I need to change them. Car has 200,000 miles.

The rear bushings on the control arm , one(passenger) is OE, the other(driverside) is toasted scan-tech.
The rears were installed when I bought the car. I did it routinely, and dont think it was really needed. Now the scan-tech is toast, but the OE looks in great shape.
Im wondering If I'll be ok with just replacing the scan-tech with OE and leaving the rest as is.
This would be great because I just happen to have one OE rear bush on hand.

To recap: the front OE(volvo)bushings have 200,000 miles on then, but still look good. The rear bushings have 100,000 miles on them. The rear passenger side has OE and still looks great. The rear driverside has toasted scan-tech, and clearly must go! The question is should I keep the others, or change them just because of the cars mileage, and that I have the arms out and will be shopping.

Thanks