When you said 'Listen' I wondered if it came from your Texas relatives originally? I say that because I don't hear people using it, and it came from my maternal grandmother...who was born in Texas.
And, these days basket vs. cart is more complicated, because all of the stores have hand held baskets, too, in case you aren't buying much.
Yes, I think that 'on line' is used in England. I did hear it said by people in the north east on the news once, though, but it's definitely not anything that I've heard here.
Love All Life; Thank You For Posting! :)