I've seen prices fluctuate pretty drastically, anywhere from 2B to 3B+
In my estimate, there were so few released into the game that transactions are spaced too far apart to establish a good trend. Assuming they will not be re-release at a later time, there is a good chance they will increase in price.
Someone was selling one to me yesterday for 2b - I was suprised, but they seem like they are steadily decreasing till past Janurary then overtime accruing value, How much value?-IDK. That would depend on whether it is rereleased, although this is one of the less likely once to be rereleased its definitely not out of the question. -Cheers