As you probably know, from my posts, I have had a lot of experience with Mike at Liberty Bellows. I don't know much about John Castiglione, but from what I have seen on this forum, he was a square/honest guy, just like Mike. I'll bet John was one of those guys that you could cut a verbal deal with a "handshake" and you knew it was as good as "Gold" -- much better than a long written contract that someone might try to "wiggle" out of.As with purchasing a previously owned car, it is definitely less expensive to buy a used accordion directly from the owner rather than from a dealer. But if it is a reputable dealer (and LB definitely is) they offer a great deal of value that, for many buyers, may be worth the added cost. To begin with, they absorb most of the risk associated with the condition of the instrument; if you buy from an individual, especially online, you take on that risk yourself. But also, they back up the sale with a warranty and they provide maintenance and repair services you will likely need at some point. When you buy online you might get the lowest price but, as they say, “all sales are final” and no returns or exchanges are available.
Several years ago I bought a used accordion from LB and, one week later, I returned it for a full refund. So my firsthand experience is that they are knowledgeable and trustworthy. Similarly, over the years I purchased two used accordions from John Castiglione, also a highly respected dealer, and I found that his prices were considerably lower than LB’s. Who knows why exactly?—maybe the overhead of doing business in Philadelphia is higher than in Detroit, or maybe LB just wants/needs a higher margin to grow their business. In any case, Castiglione is no longer in business, and LB is!
Here's my "spin" on the comparison between Mike at Liberty Bellows and John Castiglione: I think they both were, roughly the same, on their profit margin. But Mike has a much larger "overhead" than John had (I'm not sure about this). So, at Liberty Bellows, with all the online videos, of lessons, the accordions that Mike has for sale, and a full staff of qualified repair technicians -- his "overhead" has to be a lot more than what John's was, and he still has to make some profit --so his cost is higher. They are both fair/square guys.
My 2 ¢.