I used to sell on ebay for profit, not anymore. Ebay isn't a friendly place for professional sellers. Skyrocketing fees, unappreciative buyers. They want things ridiculously cheap. Your sweat and time mean nothing to them.
Since you have produced it already, I suggest you to use "buy-it-now" for $600 or so for 30-day duration, for only $0.50. You will pay a hefty fee, but still cheaper than auctioning it.
I still don't recommend making it a business, but if you really want to, I have some suggestions:
1) You can list a 30-day buy-it-now, something like "F-14 customization service". Think it $0.50-for-30 day ad. Tell your buyer to email you for orders.
2) Don't pre-manufacture! Buyers who are willing to pay that price are picky. They want their own squadrons and numbers. If you pre-manufacture what they don't want, they won't buy it.
3) Better ask for some cash like $30 in advance. Some people will fool you, ordering one then canceling it when you are making.
I don't see it as a way of paying your monthly bills unless you have a company like Jack. He takes orders, not selling finished products. I think there is a reason.
Here is from the angle of a ebay seller. Don't tread on me if you don't agree with me.

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