Adding inventory from old account

[Sbolt]

I'm interested in adding some inventory from old stealth account (store A), to a new stealth account (store B). I've read that I want to keep a 5:1 ratio of new to old items. My question is - what is the easiest way to add a large amount of new items?

One option I had in mind was creating new FBA items, and never shipping any inventory to FBA, though i'm not sure if that will work. Any feedback would be appreciated.

[amzpro]

You can look up the top 100 seller list of any category, and add all those products at hugely inflated prices.

I'm not sure how effective the strategy is in general though. I'm sure Amazon can track what you ACTUALLY sell vs listings used as dunnage