Again One and all many thanks for your helpful and enthusiastic comments. Much appreciated.
In light of your comments and further readings and discussions with the seller of the Silvertone, I have been able to re-consider my purchase.
To this end, I am back in the market place looking for a concertina. The difficulty of course is having an opportunity to hear and try a variety of instruments.
The demand in our area for this instrument is limited (as are dealers).
Based upon my experience (albeit limited) and readings I continue to want to start with a 20 button Anglo Concertina in the key of C/G.
I am seriously looking at a new Stagi C1 ($375 US) or C2 ($425 US). The price is at my upper range as a staring instrument.
I am open to comments if you would care to offer them.
Also a couple of questions:
[1] The significant difference between the C1 & C2 (for those that are familiar with the Stagi)?
[2] What greater flexibility in my playing will I eventually realize by going from a 20 button to a 30 or even a 56 button instrument?
[3] In my exploration of Concertinas I have discovered an extreme range in prices what value does one realize in an instrument priced at $3000+ range? Is it features, sound quality, aesthetics,.........?
[4] If you were to suggest the best self teaching book for a beginner learning the 20 button Anglo Concertina, what would you suggest?
Again, many thanks for all your help.