I have seen a set's of SP-X9700 go from $250 to $475 on e bay, but ya, look around people trow this stuff away!
Funny thing though I just had My horn tweeters re-coiled on my SP-X9700's and I was only able to get 8ohm coils and not the 12ohm that they are rated at, I also had a set of tweeters done for my SP-5500X's which are 8ohm. I was kinda reluctant about how they were going to sound and that was confirmed when I picked them up and he hooked them all to a signal and all the 12ohm tweeters sounded a bit brassy compared to the 8ohm, but for $10 bucks a piece I will give them a try. got them home, put them back in the box's, hooked them up and, WOW! different story when the cross-over is hooked up with them. Nice detailed tweeter sounds great.
I just wanted to let you guy's know it's ok to re-coil with 8ohm coils if you cant find the 12ohm coils. better then $45 on ebay for used stuff