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Title: Add $2 and get the whole machine.
Review: I started to purchase this replacement filter for my model 4152 air purifier but luckily decided to see what the whole machine is going for -and it was on sale for $49.99 (this was for sale at $47.99).So I bought 3 spare machines - and even if they're not running, I'll have no regret, because they contain the replacement filters. And I got free shipping as a Prime member.Next time out I'll look for washable filters because these things are expensive.
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