I have many quarts and gallons of paints made for Shell by Sherwin-Williams, Cook, Benjamin Moore, Devoe, and others. The first two are the most commonly represented. They are mostly in poor condition, with rusty rims and tops and some with labels partially detached. Even the unopened cases show rust on the tops of the cans. Am I correct in assuming that no one collects things like this in spite of their being labelled for Shell and that therefore they have no value? Thanks.