12K is a major service schedule.......
IF it's been looked after, it is a steal, for that price......but remember, 12K, valves check plus quite a few other bits n bobs MIGHT need doing....and if you think Honda mechanics are expensive, just wait 'till you try to find a good Triumph one..
BUT, the RS without a doubt, will be both faster/rarer/better handling/more economical and just as much fun as that gear driven cam V4........esp if it's a later, slower V-Tec jobbie!!
Could be a good bargain, but yes, you really need a Triumph person to go with you
No 1 reason: Triples, at tick over ( even the good ones) will sound like a mechanical bag of spanners, next to a V4 Honda, but once moving, they smooth out..
Major problems, with the later 955i 2nd Gen motah.........not really any at all.
Battery....HAS to be A+ at ALL times.....major problems can happen if you try to turn over a Triple with a weak battery.
Fuel fittings: ask if the (chocolate) plastic fuel fitting recall has been done....even better if a previous owner replaced BOTH fittings, as the one 'in the tank' can and does fail
Plugs/Petrol tank drain hoses.....should be checked, cleaned/replaced.......sometimes, water that cannot drain from the filler cap, gets into the fuel......and the l/h side sparkplug well can fill with rusty water.......
both are relatively minor fixes....but can give rise to mis firing/erratic running....
Other than that, I can't think of anything majorly wrong with the RS,...........and once you feel that triple motah pull, you will wonder what all the fuss was over almost any V4!!!!!