be careful....once you get one, you'll want more!! lol....they are very addicting....
this is probably one of the most collected sets/cards of all time....
collecting hofers, rare backs, and rarities like printers scraps, tough short prints, and hard combination of fronts and backs have been a solid choice....cards keep appreciating...
hofers are a very safe bet...
like sean said, psa just started to put the factory designations on the flip to differentiate the factory issues....
sweet cap and piedmont are the most common....factory piedmont 42's are very scarce....
believe it or not, some front / back combos are pretty tough on some of the more common backs like old mill, where only a handful of examples have been seen...
use the website t206resource.....it will give you a ton of info..
btw...email me anytime with any t206 question if I can help
peace
johnny