The singular form, which suits a product page, a dealer, or a conversion business better than the plural would. Someone searching the singular is usually looking to buy one specific unit.
Used shipping containers trade in real volume as storage, site accommodation, workshops, and increasingly as building components. The refurbished segment adds repair, painting, and modification between the shipping trade and the end user, and it’s where the margin is.
The name fits a dealer, a modification and conversion business, a modular construction company, or a marketplace. Container conversion has moved from novelty to an accepted building method with planning precedent, which has widened the buyer pool considerably.
Two plain words, no hyphen, .com, and the phrase is exactly what a buyer types. High ticket value plus research-led purchasing is the combination where an exact-match category domain earns back its cost.
It also works as a companion to the plural for anyone wanting both.
Offers considered.