Hi lagostran,
Haven't dealt with this company personally but upon checking, the only red flag I found was the fact that their email address is from a free provider. A well established and legitimate business can actually afford to get a business email with their own domain. Not to say though that all suppliers that provide you with an email address from a free provider like gmail or yahoo will rip you off but the probability/risk is high.
You can read more about protecting yourself from getting ripped off by clicking on the links below:
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Here are links to a couple of reviews about this company online:
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Welcome to Salehoo! Great to have you here!