Basically a small gameplay tip I ended up finding out accidentally so I thought Id share it with everyone else incase no one knew about it.
The information is actually found at each and every motel at the end of the road on a newspaper in front of the registery desk, here you will get some heads up information of either what item has been banned in the next town or be given a vague hint of what items will have increased sell prices. Check below to see the the location of the newspapaer.
So now that you know what's coming up in the next city you can decide to either sell off now, risk smuggling in the banned goods or ransack the shop for the item with an increased value. If you're lucky you'll find more out on the road for extra money.