I decided I "needed" a AyA 4/53 and was close to paying 4k for one new. Since shopping is most of the fun of acquiring a new gun anyway I made a list of what I wanted (features, dimensions....) and waited until I found one.
I saved over a grand on a gun that could have passed for new. If you are shopping several different makers just don't include that detail on your list of what you are looking for.
The hard part is not buying a gun that is almost what you want, but holding out for the right one.
I don't have any experience with Arrieta to compare, but I am very pleased with my AyA.
CHAZ