Yes, you can buy switches in 10 packs, or sometimes smaller, so that’s what I’d advise doing for samples during 11.11.
As Deadeye indicated, the Silent Bluish White variant dampens on both upstroke and downstroke. So that’s the one to go for.
The TTC Silent Brown didn’t receive the highest reviews. Even the improved V2 Pro are said to be scratchy. Best results I had with TTC was to put well-lubed OUTEMU Silent Sky stems in TTC Golden Brown V2 housings, using 60 G 14mm TX springs.