Since I can't return my SDS100 now because I waited to long, I guess the only thing for me to do is sell it. I hate to because it works great, but I guess I would rather eat than listen to scanners. I don't know a fair price, maybe I can sell it for $650.00 which includes the NXDN and DMR upgrades, and the small battery that came with it, and then send whoever buys it the bigger battery when I get it. Would that be fair?