When I bought my irons a week or two ago they did a free quick lie board test to make sure I didn't need a cutom fit (and a grip test and a swing speed test)
The golf industry does not have a standard for "average" lie angle for a set of clubs. So, you need to get checked out on each company's irons to see what lie angle you need.
Also, changes to the swing and stance can alter what lie angle you need. For much of my life, I had a very upright swing with a bit or a "crouch" stance. I had irons with lie 2* flat from 1994 to 2008. When I went to a flatter swing with a more upright stance, I found the "average" clubs worked for most models.
I started "catching the toe" slightly on my 2* flat irons, and went to normal lie last time I switched irons. (Main reason for switch was move from stiff to regular shafts, but in process discovered "average" lie angle now works best).