Eg. five-letter .com search: https://namebio.com/?s==ITO4gTM5ITM
Also the weekly domain sales report by Ron Jackson is another good place to get a sense of current sales: http://dnjournal.com/domainsales.htm (I believe these are included in namebio's DB, but regardless Ron adds some color commentary to the numbers)
Nice service, lots of luck.
For consumer facing product, they find you one of two ways.
1. Social (Paid ads) 2. Google search (Paid ads)
I am not talking about viral products or brands, I am talking about the average service (like this one).
I saw many companies do this mistake, some paid 10K some paid 2m<, all made a mistake IMHO.
Like it or not, Google is the entry point and how consumers will find your service.