Advice for selling my NES

I've been looking to downsize my collection some. One of the things that I am looking to part with is my NES. Specifically, the USA top loader version, that has been modded with av composite cable output, and LED under the power button. Also comes with matching dog bone controller. Everything works perfectly. But the console has yellowed due to its age. What do you think is a realistic price I can ask for to sell this? Thanks!