The way I see it is that you will have to either increase the price of your goods or you would have to be willing to take a smaller amount of profit, after paying the dropshipper his/her percentage for selling your products on their site. You would need to have enough product to be able to supply your customer (the dropshipper) as well as your own customers that you are selling direct to.

Why not try it with one product that you have a lot of and want to sell quickly. Tell your dropshipper how much you want for the product - then it's up to them how much they charge their costomers - they then keep the profit they make on the sale after they have payed you. Once you are paid by the dropshipper the agreed amount you want, then you are able to send the item/product on to the dropshipper's customer.

Feedback could work that: you receive it from your dropshipper (who is your customer) - after they have received it from their customer - indicating to them that you have delivered it.

In this situation you are considered the wholesaler and the person who wants to sell your products is putting themselves in as the dropshipper - They are selling your products and you are posting them - once you are paid by the dropshipper.

Problem can be that if they (dropshipper) were to sell something that you have run out of - and therefore can not post it out quickly -  then the dropshipper runs the risk of receiving negative feedback from his customer who paid but has not received his purchase from you - also something to consider - what if the dropshipper doesn't pay you - do you send the purchase to his customer if you haven't been paid? Not likely, but it could become confusing as to who has the money unless you work something out beforehand with your customer (the dropshipper) the problem happens.

Hope this helps.