Here's my strategy for this set. You could call it a "mini blog." Not quite enough information for a blog post, yet still good info, so I am posting it here.
I am going to buy two at midnight on June 1st. Some people will buy many more, but I am a small-scale investor. I am going to open, build, and enjoy one, and I will keep the other sealed. If it goes out of stock quickly on LEGO Shop at Home, I will flip the sealed set and sell some of the minifigures from the one I opened to make up for what I paid for it. I am hoping to sell the minifigs at $10-$15 USD to make up for the cost of the Ecto-1, which I am planning on keeping.
If this set does not sell out quickly on LEGO Shop at Home, it will still be popular. If that is the case, I will open the sealed set and part it out. I highly doubt this will happen, though, because of my experiences with other CUUSOO sets. Minecraft sold out quickly. So did the Delorean. By then, it seemed that LEGO would have learned their lesson and upped the production limit for the Curiosity Rover, but the Curiosity Rover also sold out quickly.
Even if LEGO decided to bump up the production limit for the Ecto-1, it would still sell out eventually. Ghostbusters has a huge fan base. Even kids that have never heard of Ghostbusters will still want this set because one of their friends has it.
I have to admit that I have never watched Ghostbusters and know very little about it, (other than that it is popular,) yet I am still planning on buying it. Why? Because of the design. I enjoy building cars and vehicles with advanced building techniques, and this set matches this description perfectly. I would bet that I am not the only one buying this set without being a Ghostbusters fan.
Minecraft is known as one of the best sets to flip of all time, yet its design was not very impressive. The reason the set was so popular was because Minecraft was popular. People that did not know what Minecraft was would not buy the set for the design. Here is how I classified the types of buyers of Minecraft:
1. Fans of Minecraft
2. LEGO collectors that need every single set
3. People who bought it because it's popular
The list looks similar for peeps who will be buying the Ecto-1:
1. Fans of Ghostbusters
2. LEGO collectors that need every single set
3. People who will buy it because it's popular
4. Minifigure collectors that want only the minifigures
5. LEGO collectors that like the design <--- (That's me.)
The first three types of buyers on both lists are the same, yet the Ghostbusters list has two more important types of buyers. Minecraft did not have any minifigures; the Ecto-1 does. Minecraft did not that great of a design; this set does.
So, I have a feeling that this set will possibly be as popular, or even more popular, than 21102 Minecraft.
In conclusion, my advice is to at least buy one of this set right when it comes out. If you don't, you will be kicking yourself.