Often used in business, retail, and online marketplace contexts, such as 個人セラー or トップセラー.
He lists products for sale as a seller on an online shop.
On this site, individual sellers can also list products.
cellar; storage cellar
Refers to a cellar or storage space; in modern Japanese it is especially familiar in compounds such as ワインセラー.
Old bottles are lined up in this shop's wine cellar.
I keep the red wine stored in the cellar.
販売者 is a formal, often legal or official term for a seller, whereas セラー has a casual, e-commerce-flavored feel.
セール means 'sale' (a discount event), which learners can easily confuse with セラー (seller/cellar) due to the similar katakana spelling and sound.
Written in katakana. No language-of-origin data is specified. The two listed senses correspond to the English words 'seller' and 'cellar', which are represented by the same Japanese katakana form.