Most underrated pre-war set?

[Leon]

Originally Posted by jcc6252

M101-4/5's, terrific action poses, loaded with all the stars, and plenty of back variations. What's not to like?

A lot of collectors don't care for black and white cards.

[Throttlesteer]

I'm also going to throw 1933 World Wide Gum out there. They seem to be catching up, but grossly undervalued for their scarcity.

[Kingcobb]

I know their round not square and their black and white but I have really enjoyed working on the E254 Colgan's Chip set. The first 80% of the set is pretty easy to find and really affordable I have picked commons up for less than $5.00. It's a real challenge after that and get's pricey but is exciting when one pops up on eBay.

[rickalaska]

The 1904-06 FAN CRAZE set is easily the most underrated pre-war set - compare the photography to any other set - look at the number of Hall of Famers - look at the age of the set - now look at the price and how many registered sets there are...

[ejharrington]

E107 hands down

[rhettyeakley]

M116, E254 and E121 Series of 80.

All 3 are large exhaustive sets that are really fun to collect with layers of rarity. Some people just can’t seem to bring themselves to collect things the masses don’t, I suppose it is less fun when you aren’t comparing progress or have an audience that appreciates your current pickups. There is nothing wrong with that but I think that factors into the decision to collect a particular set.

Honorable Mention:
N172 Old Judge

It seems like they were more popular a decade or two ago. Not as many people pick them up or are working on runs or player, team sets, etc. With these the price point per card scares people off but the rarities (after the tier 1 and 2 true rarities) really drops off and can sometimes be picked up for only a bit more than a truly common card.

[packs]

I've always thought the M101 set was underrated. There are very few sets that included actual contemporary photography of legendary players who are most often depicted in illustration. Yet their cards from this set routinely sell for far lower prices than their illustrated contemporaries.

[Harford20]

Agree with T205 as very underrated, but the set is certainly no secret. The prices are moving up substantially.

M116 and T3 are close behind.

[PolarBear]

Originally Posted by ejharrington

E107 hands down

This is the one I thought of.

[Cozumeleno]

M116 and T207 in my book.