Definitely fair consider you can buy a geo 3 brand new for $1350 and you are asking $1300 for everything in your sig even without the ipod. You are pretty spot on if not giving him a little more but i think its a great trade.
what do geo 2 go for now days? no pops, has new checkball, and comes with case and everything that it would come with new, and a small parts kit. like the one in sig, i know 700 is high but id rather trade then sell.