We dont' recommend buying branded goods from China so if you are after products from big name brands like Nokia, Sony etc., to get the best deals, I'd recommend going for liquidators like viatrading.com. We have other reliable liquidators in the directory that you can check out.
I tried looking for some reviews on buy-tv.net but couldn't find any except for this:
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They are fairly new online. Their website was created this year and will expire after a year.
Please click on the 'Education' tab on any SaleHoo page and have a look at some great articles with excellent tips on how to find suppliers, how to verify a Chinese supplier and proctect yourself from getting scammed, etc.
Hope that helps. Cheers,