As a reader discovered, TuneUp Media offers TuneUp for Mac and Windows for $49.95. Coupon code "FRIENDLY40" cuts it to $29.97. That ties our mention from last summer and is the lowest price we could find by $20. It includes a lifetime license to the following iTunes plug-ins: Clean; Cover Art; DeDuper; and Tuniverse.
It also offers its TuneUp Annual Subscription for $23.97 via the above coupon code. It includes the same plug-ins as above, but the license expires after one year.