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Here's a lens you don't see often; The Pentax A 200mm f/4.0 Macro.
RARE Pentax A Macro 200mm F 4 0 Ed Lens 200 mm F4 0 F4 F 4 SMC Pentax A A | eBay
But the price seems high to me, even considering the scarcity of this lens. The lens reviews here list it as a "10" and average cost $ 1,274 USD. It peaked in 2008 at about $2,200, now it seems to be roughly $1,000, if you can find one!
Anyway, the eBay seller is asking $ 2510.00 + $35.00 shipping.
Ron