When selling on Facebook, "line" typically refers to a product line or a series of related products offered for sale. It can also denote the messaging or communication style used in posts and interactions with potential customers. Effective use of "line" in marketing can help create a cohesive brand image and attract specific target audiences by highlighting the features and benefits of the products being sold.
I think it means 'still for sale'
Hit my line
That is because you are not always on-line or you come on-line once in a blue moon.
50
It started when they decided to
i think it means it means that a message will be sent to there phone or they are on line from there phone
There is no function for that in Facebook, as of now.
Now, I've never sold anything on Facebook, but on other sites, when somebody says 'bump' it means that they're boosting the thread (such as they want more people to see it, they're bumping the topic to the top).
It usually means that a retailer is selling off the the last few item from a line cheaply.
年表 (nen pyou) But if you mean a Facebook timeline, it's タイムライン (taimu rain)