Sell to People on Craiglist Without Money

I was thinking to try selling to people on crailglist without having money like in dropshipping:

I find really cheap items (hot deals) on amazon or ebay

then go on craiglist and put the item of ebay or amazon for higher price

as soon I get people buy from me, I get their money then use the money to buy the item and then ship to customer (or wait the package and ship it again)

what do you think?