It depends on the suit. Who made it, what condition it's in and most importantly how easy it will be to convert from the fursona it represents to another. That and if you've used it as a murrsuit at all forget it. Nobody wants second hand murrsuits. The best thing you can do is put it up for auction on Furbuy with a base reserve that is half of what you paid for the suit if it's in like new condition and a quarter of what you paid for it if it's well used. Don't expect to get anything close to what you paid for it.

Is "Free" and valid price?

I'll give my soul to you in exchange. XP