I don't know what it's like to sell on poshmark.ca but my experience as a (Canadian) buyer has been excellent. The vast majority of sellers are responsive, prompt and reasonable. Solid offers (not lowballing) are generally accepted or countered. Moreover, I like doing commerce within Canada. It's good for our economy, nést-ce-pas? And everything is tracked via Canada Post. You never have to worry about Customs' lags and fees. It's true that a very small minority of sellers don't ship. They simply don't. However, Poshmark will return your funds to you if the seller hasn't shipped within 7 days. A workaround is to make a reasonable/decent offer. That way, your money isn't held up even if the seller ignores your offer. I believe there's a 24-hour window for this type of transaction. I've found some wonderful items on Poshmark.ca. The shipping is a little pricey, but often enough a seller offers reduced shipping. If I could, I would leave a four-and-a-half star rating.