You are either an owner of a golf course or you want to get into the business of selling/renting golf carts. Instead of wanting to buy various carts and just hope the quality is universal, you can buy from one company and be able to get the consistent quality that you expect. However, while there will be companies that will sell you wholesale carts for cheap, many of them will be scams.
In order to avoid those scams, here are a few tips you can use to ensure the deal you are getting is legit. First and foremost, always deal local. The farther away you are from the company and the stranger the place they say they are from, the bigger the scam is. Second, always shop around with the various companies. Find out if they have any complaints filed against them with the Better Business Bureau. You can also check online to see if anyone had problems with the companies at hand. Third, always make sure everything is in writing and never take anything verbally. In a court of law, the written word will always trump what he said or what you said and other things in between.
Also check the quality of the carts and always demand a good warranty that you can pass to your customers.
Mark