There is an exploit with buying slaves from the ransom broker.
You buy them for 100g each and they sell for ~440g on the market by default. That's not the main thing, though.
If you sell them to a vendor and then Reclaim them from the top up (reclaim the first one you sold first, the one with the highest value) and all others after that the price will be jacked up. Sometimes to 1110g per slave up to 1500g per slave if you do it with enough slaves or mutliple times with a few.
Just don't actually sell them to do this. Move them over in the trader menu and then reclaim them. Price will be jacked up without leaving the menu.
Pretty big, since you can basically get an infinite amount of money.
Once you actually sold them (clearing out vendors of gold is the only limit here. and the vendor has slaves in his inventory, it doesn't seem to work anymore, though. Even if you got new slaves from a ransom broker.
Sorry if this was posted already. It wasn't listed in the current issues menu and i didn't read the entire thread.
Edit: Correction, it only works if you have enough slaves so you can drop the price to 45g, the lowest it can be for slaves, and then reclaim. At 45g, the price doesn't drop any lower, but once you reclaim the, the prices go up for everyone, so it goes way over what they initially were. I am unsure if this means that 1500g is the limit for value, i don't have enough inventory space to test it, since i am not very far into the mod, yet.