since you still have the big box, handi waxer, original bag, cord, manual and IF it has ALL the attachments inside the box are in good condition, since the vac appears to be all original, i would pay 75-100 considering what you have all there. about $20 more if you have the handi butler with all its parts and original box. but as drake said, its all what a collector is willing to pay for. what you have with its completeness for an SVII is quite indeed rare. esp with the original bag.
will hemb