If you want to get an idea of how much your domain names are worth without breaking the bank, HumbleWorth is a good option. The free tool combines AI models with large training data sets to give you a good idea of how much your domains are worth so you can make better decisions about your domain investments. It can assess unlimited batches of domains, categorizing them as keep, drop and sell, and it updates its valuations with new data so it can learn and improve.
Another tool you might find useful is Niche Finder, an all-purpose market research tool geared for keyword research and competitor analysis. Its main purpose is to find profitable niches and analyze market statistics, but it also offers in-depth website analysis, including traffic data and domain information. That could help you understand the competitive landscape and potential value of your domain names.
For generating brandable business name ideas, Namelix is an AI-powered tool that uses generative AI to suggest relevant and memorable names. It's geared for new businesses, but its name generation abilities can also help you understand how your domain names compare to potential brand names, which could factor into their resale value.