How to buy a band that has broken up?

The label will still be producing and selling their music even if the band has broken up, they just won't be making any new music is all so look in the shops. If the label is not producing their CDs or whatever then really your first port of call is the wonderful world of torrents, if that fails then you have to go trawling through the second hand record shops. There are many. if THAT fails then it's on to ebay and/or amazon.

Now.. if all that fails then you have to do what I've done once or twice which is contact the actual band members and ask them directly. This is expensive.