Yes, they do seem to be very pricey, even secondhand, although if you can wait 30 years they might be available a bit cheaper, the same as the rest of the CBAs doing the rounds in Europe.
Prices of used CBAs in Italy and France are ridiculously cheap compared with the UK. Box for box you'd probably pay twice the price of a PA for the same number of reeds and twirly bits on a CBA here. Why? They sit in dealers' shops for years, whilst PAs turn over at a reasonable rate, or so it would seem.
If they don't watch what they're doing most new European CBA players will be using Hohner Novas. Hohner are now making a fairly decent job of these, and whilst they will probably never melt the hearts of many, their affordability is bound to be a factor. Had a go on mine earlier this evening, and it's not a bad wee box for the money. They have put a lot of effort into the two voice "violon" or "celeste" tuning, which gives a nice Italian or watered down French "musette". Probably still better going for a used Italian box, but if you are craving a new accordion, then the Nova is definitely worth consideration, as long as you are not looking for "street cred". Until I took the time and trouble to become familiar with mine I slated it as being inferior, but I've since changed my opinion. If you are used to hand made reeds they might never fit the bill, but I actually quite like taking mine out for an airing these days, cheap Chinese reeds and all. It is ideal for Italian Liscio and Filuzzi, as long as you aren't looking for a lot of tone changes.