I don't think there is an age limit, however if you're a really little kid then they probably won't sell it to you in the store.
Age doesn't matter if they don't ID you. I'm 15 and buy lighters and lighter fluid at Walgreens all the time
no you can not refill a bic they are factory sealed
yes.
29.38
An average BIC lighter can cost anywhere from $0.50-$1.50. Depending on which state you live in, the tax can be high or low.
http://ask.metafilter.com/25940/How-do-bic-lighters-maintain-such-a-constant-flame
3600 F
3.25in. = 8.2mm.
2.2 grams
Supposedly the highest selling BIC lighter color is black and the lowest selling is yellow. But honestly I couldn't find a yellow BIC anywhere for months when I went looking so that's no surprise to me.
From my experience, I was able to carry a Bic lighter with me in my check in baggage.
Bic lighters are the best