Hey, just wanted to first say thank you so very much for this great great mod! <3
I've encountered a bug the other day, thought I'd share it here, maybe you can fix it in later versions.
I saw an item pop up in the used sales for $0, and when I tried leaving the sales menu and go back to the game (by pressing esc), I couldn't do it. In the console there was this error:
Error: Running LUA method 'update'. dataS/scripts/gui/elements/SmoothListElement.lua:873: attempt to compare nil < number.
I'm guessing it generated a None/Null/Nil value for the price or something, and that caused the error.
I managed to navigate to the vehicles menu, and from there I could save the game, and exit. I ended up loading the game without the mod, bought the item (for $0), saved, reloaded the game with the mod enabled, and all was ok from there on. I guess I could've also removed the item from the sales.xml file, didn't think about that at that moment.
I hope this helps with debugging it :)
Thank you!!