Amazon offers its Prime members the Nady 6" Clamp-On Microphone Pop Filter (pictured), model no. MPF-6, for $12.45 with free shipping. (Non-members can spend $35 to qualify for free shipping; otherwise, shipping adds $6.06.) That's the lowest total price we could find by $4. It features a swivel mount and gooseneck holder.

Also available is the Samson Microphone Boom Stand, model no. MK-10, for $14.99 with free shipping. (Non-members can spend $35 to qualify for free shipping; otherwise, shipping adds $7.80.) (B&H Photo-Video offers it for the same price.) That's the lowest total price we could find by $13. This collapsible tripod boom stand includes a mic clip. Note that this item ships within three to five weeks.