Welcome. One thing to keep in mind with New Hartford F-30's is that the specs are different for the F-30 Traditional and F-30 Standard. The nut width ( 1 11/16" vs. 1 3/4") is the one that concerns most people. Guild only used "F-30 Aragon" for the Traditional so you have correctly identified the model. (Tortoiseshell binding is another difference). This matters most when looking for comparable instruments since the MSRP of the Traditional was a couple hundred dollars (US) higher.
My recollection is that the street price for a new one was around $2,200 (plus or minus a couple hundred) in 2013 (plus or minus a year or two) so the price for the new one seems reasonable. The question would be what exactly is the warranty, who is responsible for warranty claims, and how much is that worth to you?
Thanks very much for the input and confirmation on the model etc. As someone points out above, for a number of reasons the warranty probably is a moot point, as I'd be buying it in Europe but am planning to move back to North America mid-summer 2021, and the Guild warranty only applies to gits purchased in US, while if any EU warranty would become irrelevant after I move.
In which case the value of the warranty becomes 0, and then it's just a question of the guitar and its current state, which appears to be like new, as the plastic is still on the pick guard and I think head stock. I've watched video samples the store owner just made and the guitar sounds very good.