When you consider that a sweet, pit-hugging Journey tee costs more than the rhinoplasty Steve Perry opted against, you get a glimpse at the perverse economy of nostalgia. For affordable vintage rock-shirtery, hit up Rags-A-GoGo.
RAGG sells everything from hoodies to cowboy boots, but the real deal's their rack of tees culled from pre-grunge antiquity, back when men were men, except when they were Wham. Each tee costs an irresponsibly low $20 and promotes a storied rock tour of yore, e.g. ACDC's Back in Black, Metallica's Don't Tread on Me, and Aerosmith's Rock and a Hard Place campaign -- notable for the absence of twin guitarists Joe Perry and Brad Whitford, though really only notable for the absence of Joe Perry. As for condition, many shirts come with original tags still attached, a sign they were first purchased by someone with freakish prescience of their future value, or a coma victim. If you don't find your faves, inventory's constantly recycled (the owner won't reveal her sources, but sufficed to say, she steals them).
If you're stocked up on rock, RAGG also vends oddball, $20 destination tees, like a pastel blue Ocean City, Maryland with "Teddy" on the back in Velva Sheen, itself providing another lesson in nostalgia: though it might be cheap in dollars, it will cost you dearly in teal.