Just do one listing, having the customer check out 100 times isn't good customer service. I think sellers tend to get too caught up in the wrong numbers (number of sales, views, likes, etc.). The only number that actually matters if you're running a serious business is net profit. That's a little simplified but at the end of the day that's what's going to make or break your business. You could have a thousand sales but if you lose money on them they are worthless.