They have possible value as a replacement...definitely worth keeping around...may be years but eventually to use exact or as close to correct parts in original rebuilds they would be good to have. Like i said may be years and many of them...If you had them in ft wayne indiana i would meet you and give you $5 maybe $10 for the pair...or recycle them although i find any original klipsch rebuild-able part to hold value...
all in all honesty may not be worth anything now although in the future absolutely...
Could be somebody around that would pay $20-25 cash right now...i'd have to draw a line at highest possible value today right now at maybe $40-45 cash for the one person you may find that would need them right now..