Hi,
Ebay is truly a great marketplace, but you need to treat it like any other business. I started selling out of my home using dropshippers. Lots of sales but slim profits. I highly recommend using a liquidator. We purchase as is Xbox 360s then refurbish them and sell them on EBAY/Amazon and our website. We just hit platinum Powerseller status! We are looking for a warehouse/shop now so we can do larger purchases and wholesale or refurbish for other sellers in the US.