You cannot get this card for cheap. If in bulk, still not cheap. If it was possible to get cheap, I would had done it or other people would had done it already to resell for profit.
My honest opinion is that the card is already at its peak...Not sure why you posted so many threads asking about the price value of your collection. Some of the cards are already at its peak and you still want the cards for more money than its worth. We have also answered all your question, the first time you asked. The price have not increased. The value could had decreased for some of your cards though.
You should check the ebay completed listings for price check.. There is no such thing as price prediction because it's all just speculation. There is no formula to know for sure which card will increase or decrease. The rate of Pokemon Collectors will not increase significantly for prices to rise, so there won't be any price increases for the near future. In my honest opinion, Pokemon has already reached its peak.
Also, if you think the card will get a PSA 10, then you should grade it, since that will increase its value. But on the other hand, most average collectors will not want PSA graded cards because they have to invest more money into the game. If it gets a PSA 8, then the price will be around the same price.