Spendor has been around for a long time (since the late 1960s, I think) and has sold enough speakers that there will nearly always be some up for sale. Its "Classic" line, while not everyone's cup of tea, is truly classic, from the SP-100 down to the SP-3/5. Glorious and natural mid-range, although not necessarily the most extended top or bottom ends.
Spendor did make a version of the BBC monitor, and one of its Classic models is the current version of that (although I'm not sure whether it still meets BBC standards). Can't recall which one, but I think its the SP-3/5. Had a pair of 3/5s (the last version) for a bit and loved them except for their lack of bass extension.
Spendor FL-9s have been about the only constant in my main system over the past many years, dutifully sounding good in various all-tube, tube-SS, and SS-only set ups.
Regards,
Chris