I have a Samsonite clam shell case that I bought for my first business trip 30 years ago. I think it cost about £100 then. (Money was cheaper in those days). Based on 20% depreciation it is now worth 0.1% of its original value, i.e. 10 New Pence.
You can't buy them new any more but there is one on Ebay right now for £200.