I agree, try to make first purchase via pinside, ask what to look for, read old threads too. I had the same worries my first CL adventure, just be chosey about what and where, and ask questions to sniff out fishy deals. I have great experience with CL though. Got a IJ and TZ both from the same area..nicer neighborhood, and couldn’t be happier. Got great deals on both, under pinside estimates based on condition. Good luck and have fun, chasing down a pin you want is half the fun!