I sell £5 an item. I have around 8-16 sales a day, but more on the low side. I usually sell on average 10 a day, so £50 a day. I have 200,000 items up. I believe eBay throttle sales, or reduce visibility for some reason. I'm a Top Rated Seller, 99.7% positive feedback, over 2000.
I got my own repricer designed for around $600, and my own amazon ripper, and use a professional responsive template and all my listings look awesome.
Now my costs per month are around £300 for vps server (to run repricer), widgetchimp, and anchor store.
So selling an average of £50 a day for 30 days, I make £1500 a month. Minus £300 costs, I usually make £1200 a month. My best month I ever had was April, which I ended up with £1500 after costs.
But I've also had a lot of trouble with eBay banning me from revising my items and uploading new ones for 30 days, twice. Plus trouble with their bloody limits system. For example this month I probably broke even, cause I got banned for uploading for 30 days, because I accidently uploaded a restricted item by mistake. So I made no profit this month. Luckily I had some CCTV installation work this month so I took a break from the ebay thing.
Even though I've yet to fully test all the categories out or this to it's full potential. I wouldn't say this is an awesome method, it's very saturated, and it isn't easy to make over £100 constantly, or I just don't know how yet. Though when I was selling at £1 profit, I was making 80-100 sales/£80-£100 a day. But imho, I'd recommend people try and find something they could flip more easily.
Imo, ebay is all about the best prices and feedback. It doesn't matter if your listings are plain or boring and has 1 picture. I see people with so many sales with boring plain listings just because they sell the cheapest in their category, which dropshipping will never truely give you.
Anyway dropshipping can be a lot of hassle, I'd wouldn't recommend it for the amount of work you have to put in to get to my point. But it's also a scenario of don't throw your baby out with the bath water. Even though I'm finding it hard to upscale and push sales/profit, and have hassle with ebay bans and limits. I'm still making £1200 for about 30 mins work, so it's definitely a good supplementary income on the side.