I like Dynadot's marketplace, it is easy to browse and use, with good functionalities.
But there is something which I miss: while I can exclude IDN from a customized list, or select specific TLDs, there is no option to exclude domain names containing numbers. And since some sellers heavily offer names containing numbers, it makes it less pleasant to browse, sort and select names.
I assume this would be something easy to implement as a further option? I strongly encourage you to do so!