Going back a while, over a year ago, I was looking to do some work on mine and googled the price of valves etc. While searching, 3 NoS ones came up being sold by Laney through eBay for £599 collected only.
They sold all on the same day, I was stunned. All 3 then resurfaced on eBay from a seller in W-s-M at £749. This was 50% of what the last retail price was IIRC.
Now, this was when sellers paid a fee on that listing, (nothing has changed in reality, it's just easier to remember prices from before the change) so if we do the maths, someone was prepared to "invest" £1797 up front, drive the 200 mile round trip from W-s-M to a Halesowen, put them into storage while waiting for them to sell for £2247 minus eBay fees, collection cost, etc.
Really!? It's a lot of outlay, effort and messing about to pocket £200-300 if you're lucky. But it shows that there are people out there...