I have 2 x 19l used corny kegs. Both are ball lock type and were serviced prior to me buying them. I have never used them as I stayed with my King keg system. Both are sealed and holding co2 as supplied to me. Externally they are used with dings and labels on them. Collection only from between York/Selby area - ã35 each or ã65 the pair - can't say fairer than that.