As you may (or should) have read in my amazing ebook, Insider Secrets to Funding Your LEGO Hobby, I sell new parts on Bricklink, almost exclusively. But that's slowly been changing. I'm not giving up new, just adding a bit more used into the mix. Here are some lessons I've learned so far.

I used this lot to teach a couple of terms of after school classes for kids. It worked pretty well, the kids improvised with older pieces just fine. When it came time for the ramp race it was immediately apparent that wheels were lacking, and I hadn't pulled any out to complete older sets. I'll continue to use this lot for classes and such but I obviously need to add some wheels and other pieces. I've thrown some of my own older pieces in too.
Lessons learned:
- Even self proclaimed LEGO fans may not always consider Mega Blocks as off limits.
- Even if all the parts are there to complete a set, the condition of pieces may not be suitable.
- Those couple of missing pieces could be worth half the amount of the set itself.