The GeForce RTX 2080 Ti is somewhat of a legend in the modding community when it comes to VRAM upgrades. The card's strange 11GB memory config lends itself very well to repair jobs that double its memory pool to 22GB. We've seen it happen in China and the UAE before, and now, a Japanese vendor offering the same services has been spotted. The shop charges 45,000 Yen, or $282, for adding 11GB of memory to your existing RTX 2080 Ti, which comes out to about $25 per gigabyte.
The shop has a very uninspired name that roughly translates to "AI to GPU Expert," since they take regular gaming cards and transform them into AI workhorses with a lot of VRAM. They operate out of Saitama Prefecture and have a store on Mercari where you can find a bunch of different modded GPUs listed for rather reasonable prices.