I'm not an authority on this but glass lined steel tanks would be seen as second best to stainless steel tanks.
The glass lined tank has a device that rusts in lieu of the tank casing rusting and it may need replacing after x years but who would check that for you I don't know.
Stainless steel cylinders and copper cylinders are usually not sold as "second hand "cylinders Because they do tend to last 20-40 years, and people tend to keep them.
Standart Glass Cylinders generally speaking need replacing between 10-20 years.
Builders ( with some exceptions ) are usually trying to save themselves money so beware