1. NEVER buy from asia, ever. Apple does not export the iPod to china, so why would China have great deals on wholesale ipods? Either their fake or greymarket, either way your screwed. Believe me, it is not worth your time looking for asian suppliers of products like these. Instead, stay within your own country like the US.
2. Don't fall for rediculously low prices. The cheapest you can possible get the new 8gb nanos is around $210 - $215 a piece and you have to buy about 25 - 50 total to get that kind of pricing. Anyone offering you 8gb nanos for $150 a piece is nothing but a stone cold crook. To get pricing anywhere near that, you'd have to do a PR(Production Run) from Apple for about 10,000 - 100,000 iPods and even then, your probably looking at $160 - $165 a unit.
3. Always and I mean, ALWAYS use some form of secured payment for your first order and probably for your 2nd, 3rd and 4th. Escrow.com is the best and use only them, I can't think of another escrow company I trust. If they don't accept escrow, back off. Credit cards are not always 100% secured so make sure you check with your bank first.
4. NEVER USE WESTERN UNION OR T/T!! Not ever. Only use bank transfer if you have done multiple and I mean multiple transactions with them. Even then, you are still at great risk for fraud.
5. Use paypal with EXTREME caution. You may think you are secured because paypal will refund you if you don't get your products. What you don't know, you will only get a refund IF the scammer still has your money in his account, which is rare. I've heard a lot of scam stories of people who paid with paypal only to never get any products and when they would file a complaint with paypal, paypal would come back saying their is no money in their account for a refund.
6. Research your company, THROUGHLY! Simply calling the guy and saying well he sounds nice and genuine isn't going to cut it. Your best bet is to check them out on the many wholesale forums out there like this one, bw.net, and thewholesaleforums.co.uk. These are great forums with talking with other traders who have had similar experiances. When in doubt about a company, don't let your greed control you. Walk away and find another company to do business with.
7. When buying in large amounts of 100 or more, try to use Hellmanns or SGS's inspection services. You will pay for it but you can be assured from them that you are getting a genuine product.
8. Be careful with the so called "brokers". Many of the iPod brokers can be legit and useful but remember, you are not getting the iPods from them, they are just taking your money, cutting a percent or dollar amount for themselves and then sending your money to their supplier to handle the shipment. If things go wrong, it can get ugly between the purchaser, broker, and supplier. It is always best to deal directly with the supplier if possible. Always ask who you are buying from if they have the stock themselves. If they say yes, ask for a picture. There is no reason they should deny you that and if they still refuse, walk away.
9. Use alibaba with caution when finding suppliers. Your best bet is to find a supplier on a reputable forum like bw.net or thewholesaleforums.co.uk where there is a feedback system in place and ALL registered sellers have to go through a verification process before being allowed to sell on the forum.
I hope this steers some of you in the right path. Even though most of this was geared towards iPods, it is very similar for those of you trying to buy PSPs, Xbox 360s, PS3s etc..I hate coming on here and reading these stories of these worthless scammers taking away your money. If anyone has any questions, feel free to send me a message and I will try to help you as best as possible.