Cymer Audio Southern Star 13E1 mono blocks
Bought from Chelsea Dave who imported them from Australia from Elson Silva (the chap that built and designed them, well regarded valve guru who uses top components and really good quality iron)
The 13E1 is a less usual choice of valve, but these amps really utilise the higher power (circa 32watts) that the 13E1 deliver whilst retaining all the single ended loveliness - so if your speakers need a bit more umph these monos could well be the answer.
In great condition, I purchased a pair of NOS tubes and had the amps fully serviced so good for a new owner for many years.
They do well with my jbls but I have decided the K2s need the 100 watts that JBL said they do in the manual - so hoping to pass these on to someone who wants SE sound with a bit more power
Valves are £90 each so not daft but will supply with two pairs, so never going to need to replace I guess (very long life spans for these babies).
Welcome to hear before buying in leek staffs, might be able to assist with delivery depending on where you are.
£2400 or reasonable offer in that ballpark