I don't think there's any accordion that can out do an AM-1100 in resale value (despite the steep asking price).
So I see a big contradiction in your claim.
Of all the Accordions I've sold, the two Petosas I've traded in have had the least depreciation (actually sold one for a profit).
Also buying pre owned from Petosa is the best of both worlds. It's almost the same price as others and you get excellent warranty and service.
Regarding your claim that the customers are gullible, I want to respond to it in detail. I've got a lot to uncover here.
I don't want to name all of the specific brands and dealers here (because some are friends), but I've had bad experiences with several of them (quality control issues, lack of support etc). I know several Petosa owners and I am yet to meet a single customer who has had a complaint.
Personally, I've gone down that route of buying something cheaper only to be disappointed and to sell it back (for a huge loss).
Here is an anecdote about Bugari.
People often claim that Bugari and Petosa are largely the same product with different badges and an inflated pricetag for the Petosa. A few years ago, in a thread in this forum, Kimric Smythe made an interesting claim. Kimric pens and operates Smythe's accordion in California. He claimed that Boaz Accordions (one of the authorized dealers for Bugari in Berkeley, California) went out of business because of all the quality control issues and the losses suffered by honoring warranty repairs on Bugari products. At the time a lot of members in the thread were surprised given that Bugari had a stellar reputation. I thought that this had something to do with the fact that Kimric is an authorized dealer for weltmeister. Maybe it was professional rivalry (most Accordion businesses have something not nice to say about other accordion business
).
Years later, my teacher mentioned that he used to work for Boaz Accordions. He confirmed that they faced a slew of issues from the Bugari models they sold in the early 2000s. They were overwhelmed by the repairs. He also mentioned that there were other reasons for the business to go under water. In fact, they abruptly closed doors without any announcements. He showed up for work today and found out that they were no longer around.
I have owned 8 Petosa Accordions. Along with the cathedral model I bought now, I have six (4 new, 2 pre owned). They are all fantastic Accordions and that's the reason I'm keeping them. I personally know more than 20 petosa owners (friends and contacts from the accordion club). Not a single complaint about the instrument's quality or service. I have never read a single negative review from any Petosa other in any of the forums or websites.
Here is a list of other Accordions that I previously bought and I had to let go because of bad experience.
1) Hohner Morino VI N:
Free 185 bass (stradella + m3 free bass) with extended keyboard. Pre owned golden era accordion. Purchase price: $7k. Sold after 10 months for $1.5K.
Why did I sell it? It was a klebe Morino (look it up). In 100 years of being in business, I am yet to see one instance of Petosa messing up with a product design and then not taking care of it under warranty.
2) Beltuna spirit V:
Purchased this to of the line accordion for a very attractive pre owned price of $5k. Sold it to a dealer for $3k. Why didn't I like it? Bass reeds were unremarkable. Didn't enjoy playing it
3) Beltuna Prestige:
Purchased pre owned from Liberty Bellows. Returned it in a month because the accordion was unremarkable.
4) Pigini Senior converter accordion:
Only Authorized service center in the US won't answer phone calls or emails. I give up after 2 months of trying. Traded it. (Lost 70% value because the problem wasn't fixed).
5) [name redacted] (because the dealer is a friend).
Brand new top of the line accordion ($10K) from a well known brand. The accordion played and sounded great but there were open holes on top of the bass button holes because of how the board was cut. Shocking quality control.
Again, you can never see problems like this in a Petosa.
6) the legendary Scandalli Super (N series from Golden era).
Great accordion overall. But I wasn't happy with the reed efficiency. Sold it back at 50% of purchase price after 2 years. Honestly, I liked by Petosa Chambertone better.
7) Hohner Gola (pre owned from the 1970s)
Purchased for $10k. The accordion needed service (curled leathers, voicing etc). There was no authorized service center in the US. I didn't want to take a chance by trying to service this elsewhere. Sold it to a private party for $9K.
8) Victoria Poeta:
This one is not mine but a friend's. I'm his own words: "the insides are as ugly and poorly made as the outside is beautiful. Very poor quality control. Reed work is horrible.
9) Brand New Scandalli Super VI;
This was also a friend's purchase. Purchased from Liberty Bellows. In his own words: "they should be ashamed to sell a new accordion with pathetic reed work like this. They were not able to fix the problems after trying several times. I returned it".
10) Beltuna converter accordion (purchased new from Liberty Bellows): This was a friend of a friend. Accordion sent back to dealer several times for issues that were not fixed. Had to send it back to Italy to get it fixed.
Now compare that with 8 out of 8 Petosa Accordions that I've owned. I enjoy all of them. I have a very responsive service team. I can drive (12 hours) to drop off for service (usually mic installs) and I don't need to worry about shipping damage.
Are they expensive? Yes.
Are the products worth it? Yes
Are there cheaper alternatives? For me, this has been a hit or miss. But you can find one if you look harder.
Are there better options for where I live(California): not really
Is there anything I've purchased that has had same level of quality control, enjoyable product and service? Not yet. There have been some good purchases but they've all fallen short at one of the aspects.
I'm discounting that that there are disgruntled Petosa customer out there that I haven't met. Given how popular they are, the fact that I haven't met one yet is a testament to the way they do business.
Tldr; you are free to have your opinions, but I don't appreciate discounting other people's experiences and calling them gullible.