If you can keep it do it, the Rio's are just 2.5 Jeeps but they are YJ's and the way things are you never know it maybe worth more the longer you sit on it. Look at how CJ's are now in 10 years give or take a YJ may hit the same boom, or may not but chances are it will only get better with age.
I have a 95 Rio, no where near as nice but I have had a TJ and trust me it just doesn't ride like and old Jeep. Keep it for weekends and find a nice something else to ride around. If I had to say a price, if you were in my area you'd get about 5000-6000. After that you could get an okay CJ or decent Sahara, that's the only thing that hurts a 2.5 no matter how nice, or at least in my area.
Love the Jeep though and trust me like was said before you'll regret selling it.