I would place any 69 B bodies value north of $15k, with the higher the trim option, the higher the value! If it's "restored", meaning really restored, you can expect the price line that Fratzog outlined for an R/T with engine problems! However, I would not expect any other Coronet from 69 to reach over $25k unless it's a Hemi car!
However, if it's a hodgepodge of different parts, or a clone car, without being a true R/T, I would estimate it at $18k for a restified example of any other model mentioned by Rani!