Yeah, as long as the person doesn't use them to buy items / TBT on this site which it doesn't sound like because otherwise (s)he wouldn't be trying to get rid of them.
I think having too much bells is game breaking. I only have a few bells like 12 million earned earnestly by turnip selling and feel very uncomfy having it... how much more is a 970m bank account. It breaks the game too much.
Animal crossing should be played at your own pace. It is enjoyable collecting things one by one.
I suggest just delete the character. Or thats just me. Haha