What do side-projects typically sell for? My own is 8 months old. It averages $3K/month in revenue with costs of $100/month. Mine is a plugin not SAAS. I've

What do side-projects typically sell for? My own is 8 months old. It averages $3K/month in revenue with costs of $100/month. Mine is a plugin not SAAS. I've had 100 sales so far, currently around 5-10 sales/month. I offer 30-day no-questions-asked refunds, but no-one has requested one yet. I've never had a visa chargeback, either. My own probably requires at least 3 software updates/year to maintain the revenue level. E.g., a small feature added or a couple bugfixes. Customers always buy annual licenses, and annual maintenance extensions to the license are half price.