Retail on these is $575, so unless you have the solid gold pro model you didn't pay $900 for these. I wouldn't throw more than $200 at them.
Here are new ones for $399, and anyone on this site can get another 10% hacked off that by asking 123ski for a code. I'm no trying to be a dick, but you aren't going to be able to sell those here at that price. Maybe on Craigslist though, give it a try there.
"For me, my family, my friends and skiing, that is for me. That's my life. The joy I get from skiing... that's worth dying for." - CR Johnson