Hard to say, Art. The NADA guide puts them around $2,600 for "low retail" -- $4,150 for "average retail" -- and $6,000 for "high retail"; those are roughly #4, #3 and #2 conditions by the Old Cars Price Guide rating (I don't have a copy of OCPG handy to see what they say for value). What you describe sounds to be somewhere in the #4 to #3 condition, so maybe it's worth around $3000 or so?
Trouble is, there's just not a great demand for these. There are those of us who love them, but we are not a great army. /bcforum/images/%%GRAEMLIN_URL%%/frown.gif They're a real kick to drive around town, and they'll even hold 55 mph or so on the level...but hills will bring them down. Biggest flaw in the car is the fact that Standard-Triumph's Chief Engineer (or whatever his title was) at the time, Ted Grinham, was a staunch believer in no-frills utility, so why have a four-speed when three was more than enough? Granted, all three forward gears are synchromesh, but the gap between first and second is large enough to drive a Renown through. /bcforum/images/%%GRAEMLIN_URL%%/wink.gif And that little flathead just doesn't have enough torque to pull around over a ton of razor-edge sheet metal.
But I think it'll take a contemporary Ford Prefect any time, anywhere! Split-window VW Beetle, I'm not so sure.... /bcforum/images/%%GRAEMLIN_URL%%/smile.gif
BTW, assuming this car is somewhere in New York or surrounding states, I'd be curious to know if it's one of those officially imported by Fergus Motors of NYC. For that matter, I'd also be curious as to the commission, engine and body numbers, etc., and I'd even put an ad on my web site (where I list Mayflowers as well as Sports 6s, Heralds and other "family" Triumphs).