It's Always Sunny in Picksylvania - S4.E8

Mike and Frank scour the Keystone state in search of unique characters with one-of-a-kind finds. First stop is a jam-packed warehouse/mancave where they come across an ultra-rare Spiderman comic book. Next they meet Leo, a tailor with a surprisingly amount of antique rarities and Morgan, a mad scientist with some explosively interesting items. The sun always shines when the guys are in Picksylvania.