It is rather interesting. I wonder if the seller has a really good negotiated rate with UPS/FedEx, or if they have multiple distributor sites.
If they use a USPS Large Flat Rate box, which holds about 3.5 gallons, their shipping costs would be $18, and the eBay/PayPal commission on the sale would be about $5, a total of $23 in expenses, even before material costs. The plaster itself is very inexpensive if obtained directly from the manufacturer.
It is also possible that they are mixing and formulating the product themselves. The main ingredient of Hydrostone, plaster of paris, ranges from $50 to $200 a ton if you get it from China.
Assuming those figures, the seller would just be breaking even, given the current sale price.
So, assuming the product is as advertised, I see 3 possibilities:
- They are not making a profit on each sale;
- or they are receiving a deeply discounted UPS/FedEx rate;
- or they are obtaining the product below market price.
Edited by drtrmiller, February 27 2015 - 7:29 PM.