Bazaar sniper tips

I sell stuff while hospitalized, let’s say I have 100m cash on hand after selling for a while.

I can get the 100m safely to stocks the problem is these snipers will buy the rest of the stuff seconds after im out that didn’t sell and mug off that before I can close my bazaar.

Any tips? I guess just don’t sell as much at once or hope I can hit stocks as soon as they buy but both those options suck. Or close bazaar first maybe but then I risk a quick mug?

Not mad at the muggers it’s a part of the game but damn what’s my options