If you buy from amazon your better to buy brand name. Wanna be a zelionaire? Sell crap for under $29.99. Your costs are low and never worth shipping back.

Better strategy: buy excellent brand name tools and sell for 40-50% off. Then you just renting excellent tools for a reasonable price.

Case in point: $160US tool, use it for weeks/months etc., sell and your cost for tool usage is $70-$80