TigerDirect offers the retail-boxed Intel Core i5-3450 3.1GHz Quad-Core Socket H2 / 1155 Ivy Bridge Processor
, model no. BX806237i53450, for $199.99. Coupon code "ZZP64729" cuts it to $184.99. With $2.29 for shipping, it's the lowest total price we could find by $13, although it was $7 less in May (since expired). It comes with a fan and features 6MB of L3 cache. Deal ends July 6.
Update: A reader found that Micro Center offers it for $149.99 via in-store pickup only.