Buying second-hand cycling equipment is something which I've done numerous times. Let's face it...the sport can be expensive when you just start out so buying brand new is not always an option. My Garmin Cycling computer I have now I actually bought second hand in Thailand a long time ago. I talk more about my experience on all this in the video.
With some things I think buying new is very important, like with a bicycle for example (that's maybe an idea for a future video). But with other things second-hand buying could save you a lot of money.
I've messed up and bought items I really shouldn't have, although overall I've had a positive experience buying used items online.
I talk about the pro's and con's in the video. Let me know what you think in the comments!