Dick's Sporting Goods has all of their fishing line buy one get one 50% off. I just picked up 2 rolls of 4lb fireline from there. The regular price spools are $15.99 (might be cheaper at Wally World?) so I got 2 for $26 tax and all. I haven't ever used the fireline for crappie its 4lb strength 1lb diameter... I'm hoping it will work out pretty well for crappie I've been using 6lb for trout for a while now and had good luck with it casting lures.
Va man , let us know how it works for you . I have use it trolling , the 10lbs worked OK . The smaller mono did
better ? Like 6lbs trolling side by side . mono & fireline . JMHO.