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here is where $ how I get these for ~$4 each
3pcs Power 5mW Laser Pointer Pen Combo Green Blue Purple Violet Red Light | eBay
make offer of 10$ let them counter offer- do NOT pay more than 12$
I got nine(3 sets) in two orders- all great-- I put my pics up the the cheap pointer pen thread.
they ship these with no battery. I doubt the Amazon set for 20$ is worth the extra $8. why make it easier for customs by having batts and lasers in the same box-duh? free batts are generally crap anyway
these are free shipping too.
Planning to own a set in a while. Those should be overspec too. If you get a dud, contact the seller and kindly ask them to send you a replacement.