I for one would totally be up for the Set-Price custom charms, as it would be more friendly to not have to be fighting everyone else, some of which more willing to throw 50s at the screen for a charm, making it an automatic forfeit for people with realistic income.
I agree with the prior. I think that set price charms would be the best idea. Furthermore, I think that a good idea for people who want a Gentlemon charm produced, but don't necessarily want to pay for "their own" would be to institute a sort of drawing for creating limited edition charms like the ones in the shop now. A special thread could be made for people to submit their want for a gentlemon, and every so often just randomly pick one to produce a small batch of.