Wow impressive finds
Btw we love thrift stores too or at least my mom does so not against any of that if it seemed it. But idk his outfit was necessarily appropriate for professional thing but I guess it'll be fine.
My mom loves thrift shops and our dump lol they have a transfer/free "mall" section and book shed. She likes Savers, Salvation Army, Good Will, local ones, etc. And there's this one in the city, Boomerangs, that is like an aids charity and is like a kinda vintage consignment shop she loves.
Although none of the shops have been as good lately cause hipsters/young people or rich people take the vintage or good stuff and either wear it or sell it or buy furniture, paint it, resell for a fortune, etc. Which sucks but oh well.
Myself I mostly wear band t shirts anyway lol and shorts, jeans or I have some other pants I love