Kaxen
Selling my books, I mainly had the biggest problem of getting people to look at it.
At first their were stood at the back of the table, but then I put the whole stack in front after a while.
I even had to put neon green post-its that said "FLIP THROUGH ME"
I took all the commissions I was suggested minus some Naruto one because I like... completely forgot how to draw Naruto... Most people seem to come prepared with reference pictures. @_@
I just uploaded the Spike Spiegel one onto my DA http://zekarmisama.deviantart.com/art/Swordfish-128544510
That's the biggest problem I usually have, too... one way I've dealt with it is to bait people over with a handout (usually a bookmark until I run out of them), and then when they're over there, try to engage them in a little conversation and invite them to "feel free to take a look at my original comics over here." If they seem not too interested, I usually follow that pretty quickly with an invitation to look at my commission book, too. (I always keep them fairly forward on the table, typically on my right-hand side. Commission book is on the left, charms in front of me, and BJDs on the left set fairly far back to help deter grabby-hands.)
Lucky you with people bringing reference pictures... I keep a boatload on my laptop so I have them handy (and am considering adding a basic internet package to my next cell phone so I can snag them that way, too) because people almost never bring them to me, they just expect me to remember how "the ninja who appeared in the background in frame 2577 of episode 562 of Naruto" looked. In detail. (I don't watch Naruto.)
And that picture is AWESOME.
biggrin