Hiya,
Inside the soundhole of the guitar you should see a very clearly visible label/sticker as the example below
On this sticker (somewhere) should be the serial number and 'clase' of the guitar. The prospective buyer's are looking for the 'A1' which denotes the model (and thus, quality) of the guitar.
I'm far from a expert on Ramirez's but I read that A1 is their top of the line Concert model (quality of wood, quality of workmanship, etc), while the much cheaper student models (4A, etc) are made from cheaper materials (laminated woods) and often out-sourced to other factories who would use more automated production.
You could chat to the US distributor for more info : https://www.ramirezguitars.us/
