販売サイトを調べてまとめたメモが残ってたので公開しておきます。
破棄するのもなんなんで。
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4-Season Tents | Backcountry.com
Shop the best selection of 4-season tents at Backcountry.com, where you'll find premium outdoor gear and clothing and experts to guide you through selection.

MSR StormKing 4-season Tent
This is MSR's largest 4-season tent. Suitable for all weather conditions, from pouring rains, to unexpected snowfalls and everything in between. The tent frame ...

Stormking
4-season basecamp tent
MSR StormKing tent (free ground shipping) :: 4-season double-wall tents :: Shelters :: Moontrail
Backpacking equipment specialists.
MSR Stormking Tent
MSR Stormking – Barneys Sports Chalet
MSR Stormking Tent
Product Specs Color Orange Capacity 5 Minimum Weight (Standard) 12 lbs 7 oz Minimum Weight (Metric) 5.56 kg Packed Weight (Standard) 13 lbs 4 oz Packed Weight (...
どこが一番安いかはそれぞれのキャンペーンがあるので一概には言えませんが
今のところmoontrailが安いですね。
売り切れてますが。
販売終了したらURLへのアクセスはできなくなりますのでご了承ください。