Hi everyone, so I just started getting into collecting paper currency and now have a small army of family and friends (not really, about 6 people) checking out their cash for interesting serial numbers, star notes, etc. My brother texted me this pic earlier of a bill he received. Its a trinary star note, I looked it up online earlier and the site said there were 640,000 printed and a 640,000 run size. It has some meter that puts it maybe a little past the halfway mark on a scale of how "rare" it is (pic attached). I'm not sure if this is a reputable site/search engine or not. Anyways, I was going to give him like $5 for the find to add it to my collection. Is this fair? Is this bill worth more, or less? If its more I don't want to rip off my brother, and will gladly kick him a few more bucks. I realize a lot if this is subjective and about what the buyer is willing to pay, but are there any good online references or books about how to determine value with regards to modern bills? I definitely have a lot to learn about this and any input is appreciated. Thanks!