Y'know how I said it was worth it to go? I meant for the layman, it'd be merely "worth it." For an insanely gifted and rather devoted fan such as yourself, it might be worth selling the firstborn. ^-^ They'll love you.
Retail guilt is the worst. I hate that feeling. But in an effort to eliminate it when I was pricing to sell directly, I've still kinda underpriced my work, so I don't feel too guilty asking a little over what it's probably worth at a shop in a touristy district where equivalent and lesser quality goods (sounds pompous, but I'm talking about plastic) sell in the same price range.
That, and my information's available. If they want it cheaper than it is in the shop, it's available direct from the artist; they just have to be driven or curious enough to Google.