Can well understand your frustration, OP. In the past I've had trouble even trying to give away (IMO very nice) apple chutney made from a stack of windfalls in a dd's garden. 'Very nice with cheese,' I said to a BiL, only to have him say, 'Oh, no, it spoils the taste!'
OK, suit yourself!
I'm not sure about pricing things to reflect time and cost at fairs, etc. though.
Last year I made a couple of dozen Christmas tree decorations for Gdd's pre-school fair. I was donating them, so didn't much care what they sold for, as long as they did. They did all go eventually, but I can't say like hot cakes, even at a low price.
Elsewhere at the fair - nowhere near my things - were some craft stalls where people were selling their own creations - mostly also Christmas decorations.
They were considerably more expensive than mine - no doubt reflecting time and cost - but an awful lot were left unsold by the end. If even a quarter of all that time and effort resulted in sales, that was about it.
It may be relevant that nearly all the people at the well-attended fair, were fairly young parents with young children - probably mostly not at all flush, given the cost of housing and childcare nowadays, esp. in that area.