People trashed me here 5 years ago when you could see everyone's portfolio in posts for mine being city heavy. My city sets have mostly done well, and they sell very quickly during the holidays. I also know that they are usually being sold to the end user so I don't get any complaints about having a mint box or crap like that (even thou my boxes are in good shape). The quality of the set is a big factor. The current city sets IMHO are not very good. Things like the last Airport Fire Truck, Dirt Bike Transporter, Cargo Terminal, Red Train, and Tanker Truck I made around 200% on and the little ones are easy to ship.