The MISR 90 has probably one of the worst reputations out there and resale is difficult as you have found out I think. My opinion is you would be trading $1100-1150 worth of guns for a $1100 gun that will probably go up in value. I would do it myself especially as JDS said if it's an FR it would be a no brainer for me.They aren’t anything special. Ak63DS and maadi MISR 90