I quite often do this with wheels and tires. I build mostly old school hot rods and customs so the big wheel rubber band tire packages that are in a lot of the kits nowadays as the optional set of hot rod wheels hold no interest for me. However, I know a lot of guys like them. So I quite often will sell them at model swap meet for between$4 and $6 a set depending on how much I paid for the kit. Works well for me to get rid of parts that I was not going to use any way to be able to make the kit cheaper for me in the end.
For example, the Revell 50 Ford pickup (yellow truck on the box art). I have sold several of them minus both sets of the wheels and tires and the complete Ardun converted flat head. I keep the flathead and the skinny wheels and white wall tires and small hubcap for myself sell the big dia wheels and tires off separately and then sell the rest of the kit. I mark it as being incomplete, missing engine and wheels and tires and I usually still get $10 for what is left of it. I will get between 5 and $6 for the large diameter wheels and tires out of it and that makes my engine, wheels and tires pretty cheap.