What is your main source of Transformer toys?

[GoktimusPrime]

I guess this is aimed more at the vintage collector as the obvious answer for those interested in current toys would be their local toy shops.

Does this answer your question of why there is no option for retail sources or do you mean something else?

I get most of my Transformers from retail stores. And I have a G1 collection too, most of which I got from retail stores. So anyway, I clicked "other" cos most of my Transformers come from local shops. :/