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Greyhound gasoline engines are marketed by Harbor Freight, Inc. I do not know this for a fact but suspect they are manufactured in China as much of Harbor Freight tools are. Many quality items from Harbor Freight, but I have not tested the engines.
Harbor Freight Tools was created in 1968.
You can't. Harbor Freight does not franchise, and all its stores are corporate.
Harbor freight is not a franchise, all stores are owned by the company
One can find Harbor Freight coupons on Harbor Freight's own website. These range from 35% to 60% and from $50 to $280 depending on the items being purchased.
A change in Harbor Freight's policies. The stores are not franchises - they're corporate.
No amount of money will get you one. Harbor Freight stores are corporate, not franchises.
A person can purchase Harbor Freight tools from their online website by mail order. Harbor Freight tools also has a series of 400 chain stores that the tools can be purchased from.
This web site in the related links says they are made in China.
China
Harbor Freight does sell shop vacs and shop vac systems. However, the company's pricing scheme isn't to sell below retail, so unfortunately you'll have to pay the normal asking price.