I've been burned in the past by spending a number of hours in the piece (all happened with freebies), delivered it to the person and they never responded. At that point I didn't even care if they never thanked me, but I would at least like to know that they saw it. So, nowadays it's either freebies / trades with my friends, or mega-bribes. I still enjoy art, a lot, but just had too many bad experiences.
I think prices in the billions are totally reasonable considering that there's not really an exchange rate between $ and gold. Of course, you can base that on how much a $1.99 or $8.99, etc item will sell on the MP but that varies a lot. One 799GC could be worth 50b, another one could be 120b.
As for my pricing, no, I don't think it's based on what the majority of Gaians can afford. I do RLCs and I think mine are reasonably priced since, based on the time it takes me to do a piece I'm typically getting less than minimum wage. For gold though, I can't use that out in the real world so I have a very high minimum bribe amount that I'm looking for.
Art is a luxury, it's not a necessity. Sure, I can get on Gaia from work so I can still post throughout the day, but I can't work on art. When I get home, I don't even have kids or family to take care of and still I don't have that much free time before I have to get some sleep.
To make a long post short, there are lots of talented artists on Gaia and I'm sure a lot of them are better, faster or cheaper than I am, but there's a reason that I do things my way and I hope people would respect that even if they disagree. 3nodding