TheMan said:A couple of questions...
How are you all getting money (not towerbux) so quickly? Are you paying for towerbux and then converting?
Second, am I imagning things or can shops only sell one item at a time? Maybe restocking takes so long that the first item sells out, but I'm not sure.
Yes, once you get the best elevator you should probably sell your blocks of 50 bux (since that's the best bux:cash ratio) for 100k, although I'd keep a small cushion to move people into apartments and speed up stocking so you can shuffle new bitizens into their dream jobs. Once you get over 25-30 floors it takes FOREVER for people to move into a new apartment via the elevator so I usually make sure I have at least 5-10 bucks at all times in order fill up the 5 spots soon after a residential floor is done being built.
Shops can sell any item they have in stock, although if you stock them in order from cheapest to most expensive you'll probably run out of the cheap item by the time the 3 coin item is ready to be stocked. I almost always stock the 3 coin first, then 2, then the 1. With low quantity 1 coin items like the Pub, you can get multiple "Fully Stocked" bonuses this way (I'd guess it's probably the fastest way to get bucks, actually).