225 /6 worth

Everyone i see keeps saying people basically give these motors away, but i cant find one near me. I got my duster, thought it needed a k member but that was because my uncle pulled the /6 member out. He was going to 360 the car but now its mine. He gave me the k member and much to his sadness i want a 225 and a turbo, because well, i like an nder dog and a turbo. So my question what is one worth on the off chance i find one? I know it comes down to what ill spend but seeing as i cant find one to know prices what would be fair to pay? Hopefully one pops up.