It has gone global but not in branding. If you search some of the names mentioned in the comments here, you´ll find that many are owned by a single company.

[–] MudMan@fedia.io 2 points 1 month ago

LBC, OLX and Wallapop don't seem to be owned by eBay, and in fact eBay competes with those in their respective territories, as far as I know. Backmarket is a bit harder to trace, but I don't think it is, either.

Even if they were, the question of why there would be different brand names operating would remain.

If anything, I suppose the real leading global brand here is Facebook. But even then, I feel these regional competitors are in a better footing there than in other areas of online services.