If he asked me, point blank, three times, all at once, in one specific visit "Is this a straw purchase ? Is this a straw purchase ? Is this a straw purchase ?" in a hounding, sanctimonious manner, then yes, I would be a little irritated, But I doubt this is what happened.
This is an issue gun shops have to deal with, and you are purchasing, at least what must seem to them, a lot of similar guns.
Sure, some of us appreciate the Ruger P-series, and they are fine pistols. But consider how it looks, from the other side of the counter. Maybe if you took a picture of the P-series collection, and showed it to the salesman, he would be more understanding.
I was thinking just that! The picture on my I-phone, guns in safe. Then explain, finances, ("Were you ever cash short? as I am) If you are not happy serving me. I will get someone else?