Hello again Charottesh,
Mixmoss.com is relatively new online, the site is less than a year old plus I was not able to locate any reviews (good and/or bad) to help us determine how they are as a dropshipper. Ideally we recommend dealing with suppliers that has been online for at least 2 years. Although this is not always a guarantee that the supplier is legitimate but it is a key indicator since scam sites would not stay online for that long :)
As mentioned in my reply to your other post, we cannot vouch for this one as well as we have not dealt with them in the past. If you decide to buy from this supplier please proceed with caution and start out if a few orders to test how they are and their products. Don't forget to use safe payment methods at all times!
Also, for any Chinese supplier please avoid brand names at all costs.
Hope this helps.