This is an older thread, but...
An FT-102 has three tubes in the PA and will easily do 180+ W PEP on the upper HF segments, with 200+ possible on the lower bands. It also has one of the best SSB IMD figures of any transmitter - past or present.
With regards to
What is the availability of those tubes in new condition now??
RF Parts carries matched sets of 6146s, which is what these rigs use.
As far as prices go:
I own two of them. Both have been to Mal Eiselman (NC4L) for rework, upgrades, enabling the Aux bandswitch position to receive an extra (non-factory-provided) segment. Mal also fitted a wide AM filter and rewired the filter-selector logic so the correct filter choice is displayed on the unit's VFD. Each radio had two filters installed by their previous owners, and both have the AM/FM Board.
As such, mine are worth $800-1000 or so to someone who wants a properly functioning, up-to-date example. A barn-fresh unit of unknown history is worth $300-400 max. Note that a good tech can do pretty much everything Mal does to a -102, but it's not a radio to go casually poking around in.
I'm in no hurry to get rid of either but there's no way I'd shell out $1250 for another unless that radio is coming straight from Mal.