DT reader Sarah points to this classic fifties steel high chair from Cosco, which just went up for sale on ebay. You'd want to check the leg straps to make sure 1) they're there and 2) they work, but otherwise, this sweet steel-trayed high chair would be mighty fresh. [ignore the "eames era"; that's just some weird ebay artifact left over from people searching eames nauseam for mid-century modernist furniture.]
Bidding starts at $34.99.