What do you think my odds of being able to sell any stock parts if I upgraded to some aftermarket? If so what do you think the parts are worth?

Hey just wondering if there was a place i might be able to buy a frame for a 3.3" 9mm in fde (or trade my current black one). I know you cant get them from Springfield because it has a serial number. Is there a good place to ask around or anybody you know trying to sell or also trade? Thanks in...