Heres my 2 cents worth.
I use DOBA as my primary supplier now, but that will change when my mistake of signing a 0ne year membership is up. Their prices are high and choosing a markup for me to make a profit is very low on most electronic products I sell. Shipping charges are high but some of the sub warehouses have low shipping charges. Transaction time is long. I have had quite a few orders processed and they still take about three days to ship.This doesn't sit well with some impatient customers.
Some other point s on DOBA: They are updating the website, it does look better than it used to, but searching for products is very frustrating. When you type in a product to search for, you end up with a lot of products that are not what you wanted. They need to do a lot of work on the search feature to make it search better.
They do list products that are out of stock. This has wasted a lot of my time explaining to customers when I can't ship
something they bought and ,or trying to get the specific product elsewhere. They say 250,000 products listed, wonder how many are out of stock.
Bottom line is you won't make much profit using DOBA.