You can buy a reasonably nice 150/150 for $35K if you are patient.
I bought my 1700 TTSN Cardinal a few years ago, and the low hours do not mean anything unless you are a collector looking for a pristine show bird. Remember that techinically, the engine manufacturers like to put "years since overhaul" into their recommendations too and 30 years since that engine has been touched would make me a little bit cautious.
Sounds like a great bird, and while it may be worth something a bit North of $25K, it certainly wouldn't be worth $30K in my book.
