Suppressors are sort of like cars; you can get many different styles, options and price ranges.
Suppressors come either wet or dry. Meaning they are meant to be used with a liquid medium inside(wet) or not(dry).
There are many different styles of baffling mechanics inside also. It just depends upon who designed the suppressor and which interior and exterior they felt was best, most dependable best value for the money etc.
As for being expendable, they really aren't. Most reputable manufacturers will back up their products. Cleaning is a service offered by many. Also many suppressors can be cleaned by the enduser. Don't forget that any suppressor sold (in the USA) requires a tax stamp, so that alone would keep it from becoming expendable for most.
I'm sure so other people will add more info or help in better ways than I can though.