I have quite a few VCDs, bought in Silom. Not all are my taste, as the cover may not match the video, or the action in the video is not what I prefer. Someone mentioned to me that you may return your vcds to the vendors, and get a discount for them, like 2 old vcd give you one from the shop, or something like that. Does anyone know how this works? Do you need to visit the same shop as you bought them from? Is this easy to do in any of the vendors there? Advice is appriciated.