FS: Blackstar HT-1R (faulty)

AlbertC

Cosmetically this is in great condition but unfortunately after it's been switched on for a few minutes it starts making intermittent popping/crackling noises. I've tried replacing the valves myself but this hasn't fixed the issue.
In all other aspects, everything works fine - the popping/crackling doesn't come through via headphones or the emulation output.
It's not really worth me laying out to get it fixed as I wouldn't use now. 

With the problem, I'm not really sure what it's worth to anyone  - any interest in say £50? 
I'm open to offers 

Local pickup would be preferable - or if you're anywhere in the Surrey/Sussex/Kent/SE London area I could possibly deliver or meet halfway. I'm in Edenbridge, Kent.
Might be able to post - the dreaded Hermes would be £7 but royal mail appear to be considerably more.

ICBM

Not for me, but if anyone else is interested, the fault is in the power section and most likely the phase inverter - the headphones/emulated output is taken from the preamp not the power amp. The PI is a discrete-transistor solid-state circuit and can occasionally cause trouble - Blackstar's customer service are very helpful if you can't find a tech familiar with fixing this.