The thing is, it really is a collector's line. All figures have only one run, and some figures are produced in ridiculously small quantities. Take the Classic Punisher for example, only 400 made. It's crazy. There are way more that 400 collectors interested in a figure like this. Hence the prices on ebay right now.
If Hot Toys limited their runs like that, you can bet most figures would be around $1000. Take a look at the price of the Godfather which was never re-released, the price is crazy.
But I have to credit Mezco for not rereleasing anything. They have been clear from the get go the figures would have just one run and that on some instances, pre-order is key to how many figures they will make. They have been fair and square in their decision. Now it does suck the aftermarket prices are so crazy, especially for me since I don't live in the us and can't pre-order anything. I always end up paying more than $80 on any figure.
This is a good strategy they have. If the figures weren't so limited, they wouldn't sell out that fast. Personally I would still get everything as I love the line and their products, it's quality stuff, but I'm sure some collectors would wait more or even not buy at all. Personally, again, I prefer Mezco over Hot Toys, but I feel the majority still likes Hot Toys better. So the limited run card is the best card they can play right now if they can't convince everyone their product is better.
The worst thing they could do right now is to make a U-turn and rerelease everything and not restrict the copies in the future. They would kill their line.
Nintendo did that with their amiibos and look at what happened: when the amiibos were so limited, everyone was going nuts over them, the aftermarket prices were completely crazy, scalpers rushed to the stores and bought as many copies as possible only to resell them on ebay, and bear in mind it's a s h i t product to begin with. It's nowhere near what Mezco is offering. But still it was sold out everywhere. The moment they rereleased all the waves and made the quantities bigger, nobody cared and a lot of people sold all their collections for a bargain. Nintendo made the worst move they ever made, even worse than the Wii U. One has to wonder who made this bad call, it's just not how you do business.
Either they should have announced in the beginning they would rerelease everything (they said the contrary), or stick to what they did in the first place. The moment you change your approach on the limited editions on a toy line, you basically say "****** you" to the original supporters of the line, the hardcore collectors, and end up losing everyone in the end.