Just find some old HM ones for cheap and pop the base pads off and re-glue them to the alternate location and get the eiffile legs from modernca. That’s what I would do. I also find good stuff when I walk around places. (I have two mustard colored ones with the stacking/locking bases) and I had a avocado green leather arm chair with swivel base, all three where found in the trash. I have also found a few neat sofas and a Knoll Bertoia diamond lounge in the trash…
But to answer your question, get the real one, even if it’s one at a time. They hold their value better for resale, and it’s something that you will use everyday, and you could use everyday for the rest of your life. but I would jump on that fake RAR for seventy quid, you can save and dump that later for like 50GBP on CL