As with most in life, you get what you pay for it.
Crescents are no different. BUT---there is one Crescent that is far superior, if in good condition. That is the Quail Hammerless. It is a 410 with 3 inch chambers that was made a bit nicer than the run of the mill others.
These little guns are great fun and as far as quality goes, even the Klunkermeister, in his vast wisdom, placed them just under the Elsie in build and design quality amongst American side locks.
This is not supposition on my part. I have a fine, high condition one, that was the favorite dove gun of a well known outdoors writer. It has been around a long time and a great many shells have passed through it. Well cared for, it has and will give happy service for many more years.
I agree that if it be in poor condition, pass on it unless it is very cheap.
Best,
John