We truly are in a different time concerning Hot Toys. Production is much higher than it was only a year ago. Take the Christopher Reeve Superman for example, BBTS still has him in stock below original retail!
Long gone are the days of having to jump on a figure, once they're in stock in HK, knowing that price will only skyrocket, by the time it hits the US shores (Wolverine anybody)!
I used to preorder all my Hot Toys from eBay member Red Dragon Statues. This seller NEVER failed me in terms of preorders. I would order HT nearly a year out, well outside of eBay/PayPals 45 day claim period. Also, once you deal with them initially, they offer you the option to deal with them directly through PayPal. They will accept a 25% deposit upon order, and will email a PayPal request for the balance once the item is in stock. It's a win-win situation really. You get the item at the original preorder amount, and if they want the repeat business, they have to pull through! Honestly, I feel bad not ordering from them anymore.
However, as stated earlier, we are in a different time. Now, with the exception of exclusives, these items will not immediately sell out at original retail. Therefore, I preorder all my HT from BBTS now. They double box all their collectibles (unlike Sideshow), and never disappoint!
As stated by a few other members, this also gives you the time to witness any changes and/or modifications to the figure without being locked into the sale. Take the ongoing modification requests regarding The Amazing Spider-Man. I would personally hate to be locked into a presell with this figure. If they don't improve the figure per fan requests, then I'm not interested!
Hope this helps!