I just found an ad in a local swap/trade rag for:

"Concertina - German made, Milano 1930's v-good condition - $85 ..." Called the number given for more details, but no answer; will try again later tonight or tomorrow (09/10/2K). Does this sound like a deal worth furthur investigation? Are there any pertainant questions I should be asking the seller prior to making the aprox. 2-hour treck to meet this concertina in person? On the basis of advice already generously provided, I am leaning towards an "Anglo" in G/D since these are the primary keys I use for guitar accompaniment.

Thanks; "Uncle Jaque", Yarmouth ME