So out of sheer boredom, I've decided to set up a little bit of a game of sorts that I started three days ago. I had about 15 million NP liquidated, so I withdrew everything from my bank. From now on, the only NP I can make are from selling stocks, playing games, selling Unbuyables in Trades, and from selling items in my shop that already had a price on it. Any new items that I AB and throw into my shop will stay unpriced (but anything I recognise as an UB will still be going into Trades).
Since I did a few big trades, I'm now down to slightly more than 10 million, but once I stop trades my liquidated wealth will be going down slowly, since what I will be buying will be stocks, training, ABing items and upgrading my shop when I inevitably run out of room. Once I run down to 250k or less, I'll price everything over the course of a day, and see just how much I can make from my shop in one day (and what shop size and how many items I can get in the duration!)
And yes, I am keeping track of the numbers. The numbers will either be rounded up/down in case of the NP or slightly fudged in the case of the items and shop size just because I'm paranoid .