I'll never sell mine.
Even if I wanted to, the shipping would be a nightmare. It was fun and exciting unboxing it and dismantling the screws and such, but packing it back up? Forget that. Besides, years from now I bet this is a crazy sought after item. The prices for the Kenner '89 Batmobiles are ridiculous now. For awhile, the demand and prices for the Hot Wheels versions were insane too (until Hot Wheels kept rereleasing them). People love them there Batmobiles.
We'll never see something like this again, especially after how difficult it was for Hot Toys to manufacture and ship. With the price increases for petroleum and plastic, this will be one of those items that people will look back on and think, "man, they actually made that?".