Actually I think the problem with asset prices is that there so many different groups of customers that buy assets for completely different reasons.

Most people here are buying assets for solely the pleasure of seeing them in their projects and have therefore a really tight budget.

And I do not know whether hobbyist should be your target audience, but maybe a non-commercial license could generate reliable revenue on the assetstore.
If you get 10x the sales on 1/4 of the price I would know what I would go for.
Maybe you could try this is out in a safe space with a 24 hour offer on the unity asset store?

Just what came to my mind when reading the debate