Years ago, I used Ebay to help build my model horse collection. I was always a buyer, never sold anything. If you've never used Ebay, there is a system of leaving feedback to rate the buyers/sellers you work with. So as a buyer, you bid, and if you win, you promptly pay for the item at which time the seller promptly ships the item. Then, if you are happy with the service and the item you leave positive feedback. And, in most cases, the seller will have already left positive feedback for you because you're awesome and were quick to pay and were polite and friendly with any written communication. Most of the time (at least back in the day, i.e. 15-20 years ago), the seller would let you know that a) your item is on the way, and b) positive feedback has been left for you. More often than not they would actually request that you also leave positive feedback for them which I always found tacky and annoying but I did anyway, and would have regardless ...
Former stay-at-home mom of twins in search of work/life balance (it doesn't exist).