In general, the profit on drop shipped items is not as high as for items purchased in bulk, because drop shippers charge a slightly inflated price to cover the storage and handling of the products they offer.
I can say there is too much competition with brand name electronics and you will be up against sellers with a lot of buying power. For brand name electronics you will need to get them directly from the companies and will be required to purchase the merchandise wholesale, which will involve a lot of money ($10.000 minimum).
Here are past forum posts that discussed about this matter - Link hidden: Login to view
As one seasoned reseller has pointed out, you are not going to make money selling name brand electronics at eBay, especially as a newbie.
The SaleHoo directory contains small wholesalers, bulk wholesalers, drop shippers, liquidators and manufacturers for hundreds of popular products such as baby clothes, DVDs, cell phones, designer jeans, computers, jewelry and much more. You may want to explore other products to test the waters of dropshipping. We will be more than willing to help search suitable suppliers that you can use.
It would be too early to give up when you have just started. I'm sure we can get our way through. The SaleHoo community has experts in the business who can pitch in golden pieces of advice. Just stay put!