Jades are notoriously slow growers so to get one to that size is a pretty impressive accomplishment. How old is it? Must at least be a decade or so.

They look quite stunning when they reach that size. Why are you selling?

Around where I live I've seen people try to sell them upwards of $100 and as low as $20. Also a few around $50 and $40. It's really up to you though. There's no real set price of plants. Most people figure out the price based on how much time and care they sacrificed to grow it.

I'd keep it though if I were you ;)