If you have any cash in your bank at all that you are not using you can still flip
My best examples for very low cost flips are VIALS OF WATER and FEATHERS. If you buy them 1GP BELOW GE SELLING PRICE, you can reliably sell them at or 1gp above the ge price. Doesn't sound like much, but for every 4-5 gp you invest you can make 1-2gp. That is the equivalent to earning 20-50% guaranteed on each investment.