just swap over prius parts into the xB. not too hard or expensive (if you find a totaled one , or something , either way much cheaper than a pure electric brand new converted xB.)
that ev xB from him will be BANK. like 80k.
converting the xB to a prius system would be like 20k on top of initial vehicle cost.
add hop up's for the engine and have a fun powerful hybrid. upgrade the gas and electric motor , add batteries. you know might as well .