Depends what your definition of valuable is. These type are not noteworthy names but can hold some sort of value solely based on the extension and relation to the true formation.
When I see these types of domains being used as an entities site, it's usually a hard pass on a visit from me. If you're doing something legitimate, invest in a proper address.
There are some creative combinations but they are outliers and backed by good product or intuitive content.
In short, no not valuable in the greater sense, you may see some trading, but the names just place names easily forgettable.