The next Front Row show is this upcoming weekend at the Pasadena Convention Center.
https://frontrowcardshow.com/collections/pasadena
There will be some vintage for sure since it sells, but most of it would be post-war. I saw some really nice photos last time too.
I am also going to be at the Ontario show in February and at least a few other vintage dealers I know will be there too. It is a huge show, and the one in Anaheim over Labor Day weekend will be even bigger, if last year's 800 tables is a guide. I hope it becomes a West Coast National but it isn't there yet since there isn't a giant morass of corporate crap in the middle, obnoxious breaking areas, or overpriced signers, but it does have some annoying jackholes bloviating into their insta accounts, so there is hope.
As for prices, well, that just depends on the dealers. My stuff is (always) modestly priced but if you are looking for a 19th century HOFer, my table is not the place to look.