I got mine from 'the source', i think it's the same as radio shack. Mine is also a 60-100x and looks similar to those ones. It was like $10.
I was in the source looking around for one of these scopes and couldn't find them. I must have looked lost so the guy came over and asked if i need a hand, i told him what i needed and he first showed me a 1.5 magnify glass or some shit like that. I told him i need something a little stronger then that. LMAO! While he was searching for one he totally caught me off guard and ask what i need it for and i was like ummmm... uurrrrrmmm... gulp... The guy says "insects"? I'm say "yeeaaahhhh, yeah that's it insects. It's for my nephew he has ant farm and is fascinated with insects". I was so stoned like usual, i wonder if he knew what it was really for?